INTERSTATE HOTELS CORP
SC 13D/A, 2000-11-06
HOTELS & MOTELS
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<PAGE>   1


                                 UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                 SCHEDULE 13D/A
                               (Amendment No. 1)

                   UNDER THE SECURITIES EXCHANGE ACT OF 1934



                         Interstate Hotels Corporation
--------------------------------------------------------------------------------
                                (Name of Issuer)

                   Common Stock (Par Value $ 0.01 Per Share)
--------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   46088R108
--------------------------------------------------------------------------------
                                 (CUSIP Number)


<TABLE>
<S>                                          <C>
         Jonathan L. Mechanic, Esq.                    Richard E. Schatz, Esq.
Fried, Frank, Harris, Shriver & Jacobson      Stearns Weaver Miller Weissler Alhadeff &
            One New York Plaza                             Sitterson, P.A.
            New York, NY 10004                   150 West Flagler Street, Suite 2200
             (212) 859-8000                             Miami, Florida 33130
                                                           (305) 789-3570
</TABLE>
                             Jeff W. Dorrill, Esq.
                               Hughes & Luce LLP
                                1717 Main Street
                                   Suite 2800
                                Dallas, TX 75201
                                 (214) 939-5425
--------------------------------------------------------------------------------
           (Name, Address and Telephone Number of Persons Authorized
                     to Receive Notices and Communications)

                                October 20, 2000
--------------------------------------------------------------------------------
            (Date of Event which Requires Filing of this Statement)


If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box
|_|.



<PAGE>   2
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    CGLH PARTNERS I LP

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       1,250,000*

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        0

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   1,250,000*
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   0

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646**

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%***

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    PN

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. See Item 5

**   Represents the aggregate amount beneficially owned by both CGLH Partners I
     LP and CGLH Partners II LP, which together hold all the securities
     initially issued pursuant to the Securities Purchase Agreement (defined
     herein). The terms of the securities prohibit any single holder from
     exercising the right to convert any securities if the conversion would
     cause such holder and its affiliates or any group of which any of them is a
     member to have beneficial ownership of more than 49% of the Company's Class
     A Common Stock after the conversion. If this restriction were not
     applicable, the securities held by CGLH Partners I LP and CGLH Partners II
     LP would, initially, be convertible into an aggregate of 7,500,000 shares
     of Class A Common Stock. See Item 5.

***  Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities held by
     CGLH Partners I LP and CGLH Partners II LP would, initially, be convertible
     into an aggregate of 7,500,000 shares of Class A Common Stock (55.2%).

                                      -2-
<PAGE>   3
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    CGLH PARTNERS II LP

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       5,778,646*

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        0

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   5,778,646*
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   0

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646**

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%***

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    PN

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. See Item 5.

**   Represents the aggregate amount beneficially owned by both CGLH Partners I
     LP and CGLH Partners II LP, which together hold all the securities
     initially issued pursuant to the Securities Purchase Agreement (defined
     herein). The terms of the securities prohibit any single holder from
     exercising the right to convert any securities if the conversion would
     cause such holder and its affiliates or any group of which any of them is a
     member to have beneficial ownership of more than 49% of the Company's Class
     A Common Stock after the conversion. If this restriction were not
     applicable, the securities held by CGLH Partners I LP and CGLH Partners II
     LP would, initially, be convertible into an aggregate of 7,500,000 shares
     of Class A Common Stock. See Item 5.

***  Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities held by
     CGLH Partners I LP and CGLH Partners II LP would, initially, be convertible
     into an aggregate of 7,500,000 shares of Class A Common Stock (55.2%).

                                      -3-
<PAGE>   4
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    LB INTERSTATE GP LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------

*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -4-
<PAGE>   5
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    LB INTERSTATE LP LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -5-
<PAGE>   6
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    PAMI LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an  aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -6-
<PAGE>   7
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    PROPERTY ASSET MANAGEMENT INC.

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    CO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -7-
<PAGE>   8
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    LEHMAN ALI INC.

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    CO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -8-
<PAGE>   9
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    LEHMAN BROTHERS HOLDINGS INC.

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    HC/CO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -9-
<PAGE>   10
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    MK/CG GP LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -10-
<PAGE>   11
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    MK/CG LP LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -11-
<PAGE>   12
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    CG INTERSTATE ASSOCIATES LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -12-
<PAGE>   13
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    CONTINENTAL GENCOM HOLDINGS, LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -13-
<PAGE>   14
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    KFP INTERSTATE, LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    DELAWARE

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -14-
<PAGE>   15
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    GROSVENOR, LLC

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    TEXAS

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -15-
<PAGE>   16
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    QUADRANGLE TRUST COMPANY (BVI) LIMITED

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    BRITISH VIRGIN ISLANDS

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -16-
<PAGE>   17
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    KFP HOLDINGS, LTD.

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    WC/AF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    TEXAS

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       0

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   0
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,778,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.4%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    OO

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable. The terms of the securities prohibit
     any single holder from exercising the right to convert any securities if
     the conversion would cause such holder and its affiliates or any group of
     which any of them is a member to have beneficial ownership of more than 49%
     of the Company's Class A Common Stock after the conversion. If this
     restriction were not applicable, the securities would be convertible into
     an aggregate of 7,500,000 shares of Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -17-
<PAGE>   18
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    SHERWOOD M. WEISER

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    PF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    USA

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       22,757

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   22,757
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,801,403*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.6%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    IN

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable together, in the case of line 11, with
     the shares of Common Stock currently owned by the Reporting Person. The
     terms of the securities prohibit any single holder from exercising the
     right to convert any securities if the conversion would cause such holder
     and its affiliates or any group of which any of them is a member to have
     beneficial ownership of more than 49% of the Company's Class A Common Stock
     after the conversion. If this restriction were not applicable, the
     securities would be convertible into an aggregate of 7,500,000 shares of
     Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -18-
<PAGE>   19
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    DONALD E. LEFTON

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    PF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    USA

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       21,505

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   21,505
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,800,151*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.6%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    IN

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable together, in the case of line 11, with
     the shares of Common Stock currently owned by the Reporting Person. The
     terms of the securities prohibit any single holder from exercising the
     right to convert any securities if the conversion would cause such holder
     and its affiliates or any group of which any of them is a member to have
     beneficial ownership of more than 49% of the Company's Class A Common Stock
     after the conversion. If this restriction were not applicable, the
     securities would be convertible into an aggregate of 7,500,000 shares of
     Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -19-
<PAGE>   20
                                  SCHEDULE 13D

---------------------------------
CUSIP No. 46088R108
---------------------------------

---------- ---------------------------------------------------------------------
1          NAME OF REPORTING PERSON
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                    KARIM ALIBHAI

---------- ---------------------------------------------------------------------
2          CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP           (a) |X|
                                                                      (b) |_|

---------- ---------------------------------------------------------------------
3          SEC USE ONLY


---------- ---------------------------------------------------------------------
4          SOURCE OF FUNDS

                    PF

---------- ---------------------------------------------------------------------
5          CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
           ITEMS 2(d) or 2(e)                                             |_|


---------- ---------------------------------------------------------------------
6          CITIZENSHIP OR PLACE OF ORGANIZATION

                    USA

---------- ---------------------------------------------------------------------
                          7    SOLE VOTING POWER

   NUMBER OF                       30,000

    SHARES               -------------------------------------------------------

 BENEFICIALLY             8    SHARED VOTING POWER

   OWNED BY                        5,778,646*

     EACH                -------------------------------------------------------
                          9    SOLE DISPOSITIVE POWER
  REPORTING
                                   30,000
    PERSON
                         -------------------------------------------------------
     WITH                 10   SHARED DISPOSITIVE POWER

                                   5,778,646*

---------- ---------------------------------------------------------------------
11         AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                    5,808,646*

---------- ---------------------------------------------------------------------
12         CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
                                                                          |_|

---------- ---------------------------------------------------------------------
13         PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                    48.6%**

---------- ---------------------------------------------------------------------
14         TYPE OF REPORTING PERSON

                    IN

---------- ---------------------------------------------------------------------
*    Represents the number of shares of Common Stock into which the Series A
     Preferred Stock and Notes beneficially owned by the Reporting Person are
     initially convertible or exercisable together, in the case of line 11, with
     the shares of Common Stock currently owned by the Reporting Person. The
     terms of the securities prohibit any single holder from exercising the
     right to convert any securities if the conversion would cause such holder
     and its affiliates or any group of which any of them is a member to have
     beneficial ownership of more than 49% of the Company's Class A Common Stock
     after the conversion. If this restriction were not applicable, the
     securities would be convertible into an aggregate of 7,500,000 shares of
     Class A Common Stock. See Item 5.

**   Represents percent of class outstanding, initially, based on 6,091,802
     shares of Class A Common Stock issued and outstanding as represented by the
     Issuer in the Securities Purchase Agreement (defined herein). The terms of
     the securities prohibit any single holder from exercising the right to
     convert any securities if the conversion would cause such holder and its
     affiliates or any group of which any of them is a member to have beneficial
     ownership of more than 49% of the Company's Class A Common Stock after the
     conversion. If this restriction were not applicable, the securities would
     be convertible into an aggregate of 7,500,000 shares of Class A Common
     Stock (55.2%).

                                      -20-
<PAGE>   21
                  Pursuant to Rule 13d-2(a) of Regulation 13D of the general
Rules and Regulations under the Securities Exchange Act of 1934, as amended,
the undersigned hereby amends its Schedule 13D statement the "Original
Statement" dated September 10, 2000 relating to the shares of common stock, par
value $.01 per share (the "Common Stock") of Interstate Hotels Corporation, a
Maryland corporation (the "Company") as set forth herein. Capitalized terms used
herein but not defined shall have the meanings set forth in the original
statement.

ITEM 2.  IDENTITY AND BACKGROUND.

                  Item 2 is hereby amended and restated as follows:

                  This Schedule 13D is being filed jointly on behalf of the
following persons (collectively the "Reporting Persons")1

CGLH Partners I LP, a Delaware limited partnership;
CGLH Partners II LP, a Delaware limited partnership;
LB Interstate GP LLC, a Delaware limited liability company;
LB Interstate LP LLC, a Delaware limited liability company;
PAMI LLC, a Delaware limited liability company;
Property Asset Management Inc., a Delaware corporation;
Lehman ALI Inc., a Delaware corporation;
Lehman Brothers Holdings Inc., a Delaware corporation;
MK/CG GP LLC, a Delaware limited liability company;
MK/CG LP LLC, a Delaware limited liability company;
CG Interstate Associates LLC, a Delaware limited liability company;
Continental Gencom Holdings, LLC, a Delaware limited liability company;
KFP Interstate, LLC, a Delaware limited liability company;
Grosvenor, LLC, a Texas limited liability company;
Quadrangle Trust Company (BVI) Limited, a British Virgin Islands corporation,
  as Trustee of The Sutherland Trust;
KFP Holdings, Ltd., a Texas limited partnership;
Sherwood M. Weiser, an individual, and a citizen of the United States of
  America;
Donald E. Lefton, an individual, and a citizen of the United States of America;
Karim Alibhai, an individual, and a citizen of the United States of America;

                  CGLH Partners I LP and CGLH Partners II LP are collectively
referred to as the "CGLH Partnerships". The CGLH Partnerships make investments
for long term appreciation. LB Interstate GP LLC and MK/CG GP LLC are both
General Partners of each of the CGLH Partnerships and together make all of the
investment decisions on behalf of the CGLH Partnerships. LB Interstate LP LLC
and MK/CG LP LLC are both Limited Partners of each of the CGLH Partnerships.


--------
1        Neither the present filing nor anything contained herein will be
         construed as an admission that any Reporting Person constitutes a
         "person" for any purpose other than for compliance with Section 13(d)
         of the Securities Exchange Act of 1934, as amended.

                                      -21-

<PAGE>   22
                  MK/CG GP LLC and MK/CG LP LLC each make investments for long
term appreciation. MK/CG GP LLC and MK/CG LP LLC are each owned 66.67% by CG
Interstate Associates LLC and 33.33% by KFP Interstate, LLC, which together make
all of the investment decisions on behalf of each of MK/CG GP LLC and MK/CG LP
LLC. The business address of each of MK/CG GP LLC and MK/CG LP LLC is 3250 Mary
Street, Suite 500, Miami, Florida 33133.

                  CG Interstate Associates LLC makes investments for long term
appreciation. CG Interstate Associates LLC participates in investment decisions
made on behalf of MK/CG GP LLC and MK/CG LP LLC as a Managing Member of those
entities. CG Interstate Associates LLC is a wholly owned subsidiary of
Continental Gencom Holdings, LLC, which makes all investment decisions on its
behalf as its Managing Member.

                  Continental Gencom Holdings, LLC makes investments for long
term appreciation. It is owned 30% by Sherwood M. Weiser, 30% by Donald E.
Lefton, and 40% by Karim Alibhai, who are each a Managing Member of Continental
Gencom Holdings, LLC, and who together make all of its investment decisions.

                  CG Interstate Associates LLC, Continental Gencom Holdings,
LLC, Sherwood M. Weiser, Donald E. Lefton, and Karim Alibhai are collectively
referred to herein as the "CG Investors". The business address of each of the CG
Investors is 3250 Mary Street, Suite 500, Miami, Florida 33133.

                  KFP Interstate, LLC makes investments for long term
appreciation. KFP Interstate, LLC participates in investment decisions made on
behalf of MK/CG GP LLC and MK/CG LP LLC. KFP Interstate, LLC is a wholly owned
subsidiary of KFP Holdings, Ltd.

                  KFP Holdings Ltd. makes investments for long term
appreciation. It is owned 1% by Grosvenor, LLC and 33% by each of Jaffer Khimji
Grantor Trust, St. Giles Trust and Mahmood Khimji. Grosvenor, LLC is its General
Partner and makes all investment decisions on its behalf.

                  Grosvenor, LLC is wholly owned by Quadrangle Trust Company
(BVI) Limited as sole Trustee of The Sutherland Trust, a discretionary trust
which makes investments for long term appreciation. Quadrangle Trust Company
(BVI) Limited is a company regulated and licensed by the British Virgin Islands
government that provides trustee services. Its principal place of business is
PO Box 438, Tropic Isle Building, Wickshams Cay 1, Roadtown, Tortola, British
Virgin Islands.

                  KFP Interstate, LLC, KFP Holdings, Ltd., Grosvenor, LLC, and
Quadrangle Trust Company (BVI) Limited are collectively referred to herein as
the "KFP Investors".

                  LB Interstate GP LLC and LB Interstate LP LLC each make
investments for long term appreciation. Each is wholly owned by PAMI LLC, which
makes all investment decisions on its behalf.


                                      -22-
<PAGE>   23
                  PAMI LLC makes investments for long term appreciation. It is
wholly owned by Property Asset Management Inc., which makes all investment
decisions on its behalf.

                  Property Asset Management Inc. makes investments for long term
appreciation. It is 99.75% owned by Lehman ALI Inc., which makes all investment
decisions on its behalf.

                  Lehman ALI Inc. makes investments for long term appreciation.
It is wholly owned by Lehman Brothers Holdings Inc., which makes all investment
decisions on its behalf.

                  Lehman Brothers Holdings Inc., through its domestic and
foreign subsidiaries, is a full line securities firm.

                  LB Interstate GP LLC, LB Interstate LP LLC, PAMI LLC, Property
Asset Management Inc., Lehman ALI Inc. and Lehman Brothers Holdings Inc. are
collectively referred to herein as the "Lehman Investors".

                  The business address of, and the name, business address,
present principal occupation or employment and citizenship of each executive
officer and director or limited partner of Reporting Persons Property Asset
Management Inc., Lehman ALI Inc., Lehman Brothers Holding Inc., KFP Holdings
Inc. and Quadrangle Trust Company (BVI) Limited are set forth in Schedules A
through E hereto which are incorporated herein by reference.

                  During the last five years, none of the Reporting Persons nor,
to the knowledge of each of the Reporting Persons, the persons listed on
Schedules A through E hereto (i) has been convicted in a criminal proceeding
(excluding traffic violations or similar misdemeanors) or (ii) has been a party
to a civil proceeding of a judicial or administrative body of competent
jurisdiction and as a result of such proceeding was or is subject to a judgment,
decree, or final order enjoining future violations of, or prohibiting or
mandating activities subject to federal or state securities laws or finding any
violation with respect to such laws, with the potential exceptions described in
the next paragraph.

                  Lehman Brothers Inc., an affiliate of the Lehman Investors,
has been involved in a number of civil proceedings which concern matters arising
in connection with the conduct of its business. Certain of such proceedings have
resulted in findings of violation of federal or state securities laws. Each of
these proceedings was settled by Lehman Brothers Inc. consenting to the entry of
an order without admitting or denying the allegations in the complaint. All of
such proceedings are reported and summarized in the Schedule D to Lehman
Brothers Inc.'s Form BD filed with the Securities and Exchange Commission, which
descriptions are hereby incorporated by reference.

                  The Reporting Persons have entered into a Joint Filing
Agreement, dated as of November 6, 2000, a copy of which is attached hereto as
Exhibit 1. Neither the fact of this filing nor anything contained herein shall
be deemed an admission by the Reporting Persons that they constitute a "group"
as such term is used in Section 13(d)(1)(k) of the rules and regulations under
the Exchange Act.

                  Schedule E, in the form attached hereto, is hereby added to
this statement.

ITEM 3.           SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

                  Item 3 is hereby amended and restated as follows:

                  The CGLH Partnerships required $30,000,000 to purchase
securities pursuant to the Securities Purchase Agreement, as described in Item
4. Such securities were purchased by the CGLH Partnerships only. These funds
were obtained from capital contributions by their


                                      -23-
<PAGE>   24
partners, who in turn obtained such funds from their available funds as
working capital or capital contributions by their direct or indirect owners,
funded from their available funds.

                  None of the individuals listed on Schedules A through E hereto
has contributed any funds or other consideration towards the purchase of the
Preferred Stock and Notes (as defined in Item 4) except insofar as they may have
partnership interests in any of the Reporting Persons and have made capital
contributions to any of the Reporting Persons, as the case may be.

ITEM 4.           PURPOSE OF TRANSACTION.

Consummation of Transactions

                  The purchase of the Notes and the Preferred Stock, each as
contemplated by the Securities Purchase Agreement, and the execution of the
other documentation at the Closing as contemplated by the Securities Purchase
Agreement, all as described in Items 4 and 6 of the Original Statement,
occurred on October 20, 2000.


                                      -24-
<PAGE>   25

ITEM 5.         INTERESTS IN SECURITIES OF THE ISSUER.

Item 5 is hereby amended and restated as follows:

                  (a) The information contained in Items 11 and 13 of each of
the cover pages to this Schedule 13D are incorporated herein by reference.

                  Based on the information disclosed by the Company in the
Securities Purchase Agreement, as of August 31, 2000, there were 6,091,802
shares of Common Stock issued and outstanding.

                  Pursuant to the Securities Purchase Agreement, at the closing,
the GCLH Partnerships acquired securities which are initially convertible into
shares of Common Stock at a conversion price of $4.00 per share. The terms of
the Notes and the Preferred Stock prohibit any single holder from converting
such securities if the conversion would cause such holder and its affiliates or
any group of which any of them is a member to have beneficial ownership of more
than 49% of the Company's Class A Common Stock after the conversion.
Accordingly, as at the closing, the CGLH Partnerships do not have the right to
convert the Notes and the Preferred Stock into more than 5,778,646 shares of
Common Stock. Absent this restriction, the Notes and Preferred Stock would be
initially convertible into an aggregate of 7,500,000 shares of Common Stock,
representing approximately 55.2% of the outstanding shares of Common Stock after
giving effect to the conversion. In addition, if all or part of the Notes and
Preferred Stock are transferred to unaffiliated persons so that no single person
and its affiliates would, upon conversion, own more than 49%, then 7,500,000
shares of Common Stock would be issuable upon conversion of the Notes and the
Preferred Stock.

                  The Lehman Investors disclaim beneficial ownership of the
shares of Common Stock beneficially owned by the CGLH Partnerships to the extent
of the interests in the CGLH



                                      -25-
<PAGE>   26
Partnerships held by persons other than the Lehman Investors. Lehman Brothers
Inc., a wholly owned broker-dealer subsidiary of Lehman Brothers Holdings Inc.,
and other affiliates acting in the ordinary course of business as broker
dealers, may have purchased and sold shares of Common Stock on behalf of their
customers.

                  The CG Investors disclaim beneficial ownership of the shares
of Common Stock beneficially owned by the CGLH Partnerships to the extent of the
interests in the CGLH Partnerships held by persons other than the CG Investors.

                  The KFP Investors disclaim beneficial ownership of the shares
of Common Stock beneficially owned by the CGLH Partnerships to the extent of the
interests in the CGLH Partnerships held by persons other than the KFP Investors.

                  None of the Reporting Persons or, to the knowledge of the
Reporting Persons, the persons listed on Schedules A to E hereto beneficially
owns any shares of Common Stock other than as set forth herein.

                  (b) The information contained in Items 7, 8, 9 and 10 of each
of the cover pages to this Schedule 13D are incorporated herein by reference.
With respect to the Lehman Investors, neither the Lehman Investors nor to the
best knowledge of the Lehman Investors any of the persons listed in Schedules A
through C hereto know of any other person who has the right to receive or the
power to direct the receipt of, any shares of Common Stock beneficially owned by
the Lehman Investors, other than customers of Lehman Brothers over whose shares
Lehman Brothers may have investment discretion.

                  (c) Except as described in Item 4 of this Schedule 13D, no
transactions in the shares of Common Stock were effected by the Reporting
Persons, or, to their knowledge, any of the persons listed on Schedules A
through E hereto, during the past sixty days.

                  (d) and (e)       Not applicable.


ITEM 6.           CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS
                  WITH RESPECT TO SECURITIES OF THE ISSUER.

Consummation of Transactions

                  The purchase of the Notes and the Preferred Stock, each as
contemplated by the Securities Purchase Agreement, and the execution of the
other documentation at the Closing as contemplated by the Securities Purchase
Agreement, all as described in Items 4 and 6 of the Original Statement,
occurred on October 20, 2000.

ITEM 7.           MATERIAL TO BE FILED AS EXHIBITS.

Exhibit 1         Joint Filing Agreement


                                      -26-
<PAGE>   27




                                    SIGNATURE

                  After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement is true,
complete and correct.

November 3, 2000


                                            CGLH Partners I LP


                                            By: /s/ Joseph J. Flannery
                                               --------------------------------
                                               Name: Joseph J. Flannery
                                               Title: Authorized Signatory



                                            CGLH Partners II LP


                                            By: /s/ Joseph J. Flannery
                                               --------------------------------
                                               Name: Joseph J. Flannery
                                               Title: Authorized Signatory



                                            LB Interstate GP LLC


                                            By: /s/ Joseph J. Flannery
                                               --------------------------------
                                               Name: Joseph J. Flannery
                                               Title: Authorized Signatory



                                            LB Interstate LP LLC


                                            By: /s/ Joseph J. Flannery
                                               --------------------------------
                                               Name: Joseph J. Flannery
                                               Title: Authorized Signatory


                                      -27-
<PAGE>   28


                                            PAMI LLC


                                            By: /s/ Joseph J. Flannery
                                               --------------------------------
                                               Name: Joseph J. Flannery
                                               Title: Authorized Signatory



                                            Property Asset Management Inc.


                                            By: /s/ Joseph J. Flannery
                                               --------------------------------
                                               Name: Joseph J. Flannery
                                               Title: Authorized Signatory



                                            Lehman ALI Inc.



                                            By: /s/ Joseph J. Flannery
                                               --------------------------------
                                               Name: Joseph J. Flannery
                                               Title: Authorized Signatory



                                            Lehman Brothers Holdings Inc.


                                            By: /s/ Yon Cho
                                               --------------------------------
                                               Name: Yon Cho
                                               Title: Authorized Signatory



                                            MK/CG GP LLC


                                            By: /s/ Sherwood M. Weiser
                                               --------------------------------
                                               Name: Sherwood M. Weiser
                                               Title: Authorized Signatory



                                      -28-
<PAGE>   29


                                      MK/CG LP LLC


                                      By: /s/ Sherwood M. Weiser
                                         --------------------------------
                                         Name: Sherwood M. Weiser
                                         Title: Authorized Signatory



                                      CG Interstate Associates LLC


                                      By: /s/ Sherwood M. Weiser
                                         --------------------------------
                                         Name: Sherwood M. Weiser
                                         Title: Authorized Signatory



                                      Continental Gencom Holdings, LLC


                                      By: /s/ Sherwood M. Weiser
                                         --------------------------------
                                         Name: Sherwood M. Weiser
                                         Title: Authorized Signatory



                                      KFP Interstate, LLC


                                      By: /s/ Mahmood Khimji
                                         --------------------------------
                                         Name: Mahmood Khimji
                                         Title: Authorized Signatory



                                      Grosvenor, LLC

                                      By: /s/ Mahmood Khimji
                                         --------------------------------
                                         Name: Mahmood Khimji
                                         Title: Authorized Signatory



                                      Quadrangle Trust Company (BVI) Limited
                                        as trustee of The Sutherland Trust

                                      By: /s/ Judy Hylton
                                         --------------------------------
                                         Name: Judy Hylton
                                         Title: Director



                                      -29-
<PAGE>   30




                                            KFP Holdings, Ltd.


                                            By: /s/ MAHMOOD KHIMJI
                                               --------------------------------
                                               Name: Mahmood Khimji
                                               Title: Authorized Signature




                                            Sherwood M. Weiser

                                            /s/ Sherwood M. Weiser
                                            -----------------------------------



                                            Donald E. Lefton

                                            /s/ Donald E. Lefton
                                            -----------------------------------



                                            Karim Alibhai

                                            /s/ Karim Alibhai
                                            -----------------------------------


                                      -30-
<PAGE>   31

                                                                      SCHEDULE E

                        Executive Officers and Directors
                                       of
                     Quadrangle Trust Company (BVI) Limited


                  The names and principal occupations of the directors and
executive officers of Quadrangle Trust Company (BVI) Limited are as set forth
below.



          Name                               Present Principal Occupation
          ----                               ----------------------------

Directors:

Susan Demers (a United States citizen)       Attorney at Law
                                             Insinger Trust (BVI) Limited
                                             PO Box 438,
                                             Tropic Isle Building,
                                             Wicksham Cay 1,
                                             Roadtown, Tortola,
                                             British Virgin Islands

Grant Brown (a New Zealand citizen)          Chartered Accountant
                                             Insinger Trust (BVI) Limited
                                             PO Box 438,
                                             Tropic Isle Building,
                                             Wicksham Cay 1,
                                             Roadtown, Tortola,
                                             British Virgin Islands

Judy Hylton (a Jamaican citizen)             Attorney at Law
                                             Insinger Trust (BVI) Limited
                                             PO Box 438,
                                             Tropic Isle Building,
                                             Wicksham Cay 1,
                                             Roadtown, Tortola,
                                             British Virgin Islands

Raymond Page (a United Kingdom citizen)      Chartered Accountant
                                             Insinger Trust (BVI) Limited
                                             PO Box 237,
                                             St. Peter Port,
                                             Gurnsey,
                                             Channel Islands
<PAGE>   32


                                    EXHIBITS

Exhibit 1           Joint Filing Agreement

<PAGE>   33


                       EXHIBIT 1 - JOINT FILING AGREEMENT

                             Joint Filing Agreement

         The undersigned hereby agree that the Amendment No. 1 to the Statement
on Schedule 13D filed herewith (and any subsequent amendments thereto), relating
to the common stock, par value $0.01 per share, of Interstate Hotels
Corporation., is being filed jointly with the Securities and Exchange Commission
pursuant to Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as
amended, on behalf of each such person.

Dated: November 6, 2000



<PAGE>   34


                                            CGLH Partners I LP


                                            By: /s/ JOSEPH J. FLANNERY
                                                -------------------------------
                                                Name: Joseph J. Flannery
                                                Title: Authorized Signatory



                                            CGLH Partners II LP


                                            By: /s/ JOSEPH J. FLANNERY
                                                -------------------------------
                                                Name: Joseph J. Flannery
                                                Title: Authorized Signatory



                                            LB Interstate GP LLC


                                            By: /s/ JOSEPH J. FLANNERY
                                                -------------------------------
                                                Name: Joseph J. Flannery
                                                Title: Authorized Signatory



                                            LB Interstate LP LLC


                                            By: /s/ JOSEPH J. FLANNERY
                                                -------------------------------
                                                Name: Joseph J. Flannery
                                                Title: Authorized Signatory



                                            PAMI LLC


                                            By: /s/ JOSEPH J. FLANNERY
                                                -------------------------------
                                                Name: Joseph J. Flannery
                                                Title: Authorized Signatory




<PAGE>   35


                                            Property Asset Management Inc.


                                            By: /s/ JOSEPH J. FLANNERY
                                                -------------------------------
                                                Name: Joseph J. Flannery
                                                Title: Authorized Signatory



                                            Lehman ALI Inc.


                                            By: /s/ JOSEPH J. FLANNERY
                                                -------------------------------
                                                Name: Joseph J. Flannery
                                                Title: Authorized Signatory



                                            Lehman Brothers Holdings Inc.


                                            By: /s/ YON CHO
                                                -------------------------------
                                                Name: Yon Cho
                                                Title: Authorized Signatory



                                            MK/CG GP LLC


                                            By: /s/ SHERWOOD M. WEISER
                                                -------------------------------
                                                Name: Sherwood M. Weiser
                                                Title: Authorized Signatory



                                            MK/CG LP LLC


                                            By: /s/ SHERWOOD M. WEISER
                                                -------------------------------
                                                Name: Sherwood M. Weiser
                                                Title: Authorized Signatory




<PAGE>   36


                                        CG Interstate Associates LLC

                                        By: /s/ SHERWOOD M. WEISER
                                            -------------------------------
                                            Name: Sherwood M. Weiser
                                            Title: Authorized Signatory



                                        Continental Gencom Holdings, LLC


                                        By: /s/ SHERWOOD M. WEISER
                                            -------------------------------
                                            Name: Sherwood M. Weiser
                                            Title: Authorized Signatory



                                        KFP Interstate, LLC


                                        By: /s/ MAHMOOD KHIMJI
                                           --------------------------------
                                           Name: Mahmood Khimji
                                           Title: Authorized Signature



                                        Grosvenor, LLC


                                        By: /s/ MAHMOOD KHIMJI
                                           --------------------------------
                                           Name: Mahmood Khimji
                                           Title: Authorized Signature



                                        Quadrangle Trust Company (BVI) Limited
                                          as trustee of The Sutherland Trust

                                        By: /s/ JUDY HYLTON
                                           --------------------------------
                                           Name: Judy Hylton
                                           Title: Director



                                        KFP Holdings, Ltd.


                                        By: /s/ MAHMOOD KHIMJI
                                           --------------------------------
                                           Name: Mahmood Khimji
                                           Title: Authorized Signature




<PAGE>   37


                                            Sherwood M. Weiser

                                            /s/ SHERWOOD M. WEISER
                                            ---------------------------------

                                            Donald E. Lefton

                                            /s/ DONALD E. LEFTON
                                            -----------------------------------

                                            Karim Alibhai

                                            /s/ KARIM ALIBHAI
                                            -----------------------------------



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