dennygun ... I use XIPKitchen_Beta6. Here is the link:
http://forum.xda-developers.com/showthread.php?t=443383
I had a few issue with previous XIPKitchen builds on Vista Ultimate but haven't had any problems since I updated to beta6. My issues with Vista related to "shadow copy" feature interfering during build. Lots of setup info on the lennysh's thread.