Exhibit (d)(3)(iv)

                         IXIS U.S. DIVERSIFIED PORTFOLIO
                  Amendment No. 2 to the Sub-Advisory Agreement
                        (Loomis, Sayles & Company, L.P.)

                                  July 1, 2005

        Pursuant to Section 11 of the Sub-Advisory Agreement (the "Agreement")
dated October 30, 2000 among IXIS Advisor Funds Trust I (formerly, CDC Nvest
Funds Trust I), with respect to its IXIS U.S. Diversified Portfolio (formerly,
CDC Nvest Star Advisers Fund) series (the "Series"), IXIS Asset Management
Advisors, L.P. (formerly, CDC IXIS Asset Management Advisers, L.P.) (the
"Manager") and Loomis, Sayles & Company, L.P. (the "Sub-Adviser"), the Agreement
is hereby amended by deleting Section 7 in its entirety and replacing it with
the following:

7. Compensation of the Sub-Adviser. As full compensation for all services
rendered, facilities furnished and expenses borne by the Sub-Adviser hereunder,
the Sub-Adviser shall be paid at the annual rate of 0.50% of the first $250
million of its Segment's average daily net assets and 0.45% of its Segment's
average daily net assets in excess of $250 million. Such compensation shall be
paid by the Trust (except to the extent that the Trust, the Sub-Adviser and the
Manager otherwise agree in writing from time to time). Such compensation shall
be payable monthly in arrears or at such other intervals, not less frequently
than quarterly, as the Manager is paid by the Series pursuant to the Advisory
Agreement.


IXIS ASSET MANAGEMENT ADVISORS, L.P.
By:    IXIS Asset Management Distribution Corporation, its general partner

By:    /s/ John T. Hailer
       -------------------------------------
Name:  John T. Hailer
Title: President and Chief Executive Officer


LOOMIS, SAYLES & COMPANY, L.P.
By:    Loomis, Sayles & Company, Inc., its general partner

By:    /s/ Kevin Charleston
       -------------------------------------
Name:  Kevin Charleston
Title: Director


IXIS ADVISOR FUNDS TRUST I
On behalf of its IXIS U.S. Diversified Portfolio series

By:    /s/ John T. Hailer
       -------------------------------------
Name:  John T. Hailer
Title: President