Powerbuilder - SqlServer 2005

I am at a client who uses powerbuilder with SqlServer 2000.  The PB
code makes heavy use of calls to stored procedures prepared by the
SqlServer DBA group [select, insert, update].  The procs contain
embedded calls and references to other procs / views.

They're migrating to SqlServer 2005 / Win 2003 Server 64-bit.  Does
anyone have PB experience in modifying connection[s] / SQL
declare/execute/fetch statements for this kind of upgrade?  Please let
me know what you learned and give any advice you can.  My contract is
due to end soon, and I really want to help these people out - I am the
only PB resource they have.  Thanks.