EXHIBIT NO. EX-99.h.1.vi

                        DIMENSIONAL INVESTMENT GROUP INC.


                        FORM OF TRANSFER AGENCY AGREEMENT
                               ADDENDUM NUMBER SIX

         THIS ADDENDUM is made as of the __ day of _________, 2001, by and
between DIMENSIONAL INVESTMENT GROUP INC., formerly known as the "DFA U.S.
Large Cap Portfolio Inc.," a Maryland corporation (the "Fund"), and PFPC
INC., formerly known as "Provident Financial Processing Corporation" (the
"Transfer Agent" or "PFPC").

                              W I T N E S S E T H :

         WHEREAS, the Fund is registered as an open-end, management investment
company under the Investment Company Act of 1940, as amended, and its securities
are registered under the Securities Act of 1933, as amended; and

         WHEREAS, the Fund has retained PFPC to serve as the Fund's transfer
agent, registrar and dividend disbursing agent, pursuant to a Transfer Agency
Agreement dated July 12, 1991, as amended, (the "Agreement") which, as of the
date hereof, is in full force and effect; and

         WHEREAS, Paragraph 1 of the Agreement provides that PFPC shall provide
such services to any class of shares created by the Fund after the date of the
Agreement upon mutual agreement of the Fund and Transfer Agent; and

         WHEREAS, PFPC presently provides such services to those portfolios of
the Fund designated as The DFA 6-10 Institutional Portfolio, U.S. 6-10 Small
Company Portfolio K, U.S. 4-10 Value Portfolio K and U.S. 6-10 Value Portfolio
II, which portfolios shall be renamed The DFA Small Cap Institutional Portfolio,
U.S. Small Cap Portfolio K, U.S. Small XM Value Portfolio K and U.S. Small Cap
Value Portfolio II, respectively, and which are listed on Schedule B attached
hereto; and

         WHEREAS, Tax-Managed U.S. Marketwide Value Portfolio XI has ceased to
be a series of the Fund and shall no longer be considered "Shares" under the
Agreement; and

         WHEREAS, Paragraph 23 of the Agreement provides that the Agreement may
only be changed by a written instrument signed by the party against which
enforcement of such change is sought;

         NOW, THEREFORE, in consideration of the premises and mutual covenants
herein contained, and intending to be legally bound thereby, the parties hereby
agree that:

         1. The Agreement is amended to provide that those series set forth on
"Schedule B, Portfolios of Dimensional Investment Group Inc., Amended and
Restated April 1, 2001," which is attached hereto, shall be "Shares" under the
Agreement.

         2. The fee schedules of the Transfer Agent applicable to the Shares
shall be as agreed to in writing, from time to time, by the Fund and the
Transfer Agent.

         3. In all other respects, the Agreement shall remain unchanged and in
full force and effect.


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         4. This Addendum may be executed in two or more counterparts, each of
which shall be deemed an original, but all of which together shall constitute
one and the same instrument.

         5. The effective date of this Addendum shall be April 1, 2001.

         IN WITNESS WHEREOF, the parties hereto have caused this Addendum Number
Six to the Agreement to be executed by their duly authorized officers designated
below on the day and year first above written.

                                            DIMENSIONAL INVESTMENT GROUP INC.

                                            By:  __________________________
                                                  Catherine L. Newell
                                                  Vice President and Secretary


                                            PFPC INC.

                                            By:  ___________________________
                                                  Joseph Gramlich
                                                  Senior Vice President


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                                                            AMENDED AND RESTATED
                                                                   APRIL 1, 2001

                                   SCHEDULE B

                                  PORTFOLIOS OF
                        DIMENSIONAL INVESTMENT GROUP INC.

                    THE DFA SMALL CAP INSTITUTIONAL PORTFOLIO
                        U.S. LARGE CAP VALUE PORTFOLIO II
                        U.S. SMALL CAP VALUE PORTFOLIO II
                      THE DFA INTERNATIONAL VALUE PORTFOLIO
                      DFA INTERNATIONAL VALUE PORTFOLIO II
                      DFA INTERNATIONAL VALUE PORTFOLIO III
                       U.S. LARGE CAP VALUE PORTFOLIO III
                   AAM/DFA U.S. HIGH BOOK TO MARKET PORTFOLIO
                AAM/DFA TWO-YEAR CORPORATE FIXED INCOME PORTFOLIO
                      AAM/DFA TWO-YEAR GOVERNMENT PORTFOLIO
                          EMERGING MARKETS PORTFOLIO II
                      DFA INTERNATIONAL VALUE PORTFOLIO IV
                 TAX-MANAGED U.S. MARKETWIDE VALUE PORTFOLIO II
                U.S. LARGE COMPANY INSTITUTIONAL INDEX PORTFOLIO
                           U.S. SMALL CAP PORTFOLIO K
                        U.S. LARGE CAP VALUE PORTFOLIO K
                         U.S. SMALL XM VALUE PORTFOLIO K
                         U.S. LARGE COMPANY PORTFOLIO K
                       DFA INTERNATIONAL VALUE PORTFOLIO K
                          EMERGING MARKETS PORTFOLIO K
                      DFA ONE-YEAR FIXED INCOME PORTFOLIO K
                  DFA TWO-YEAR GLOBAL FIXED INCOME PORTFOLIO K


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