Coincidentally I did exactly that this morning - Win 2000 DB2 v7.2 backup to create db on Win XP DB2 v8.1.
All works fine apart from I get some strange error about when trying to access Task_Center - DBA1177N A database connection to the Tools Catalog Database "" cannot be made. SQLCODE "1013" - which is why I am here!
Regardless, all the data is in place and as it should be.
Richard