My Limewire works well with vista becuase I run it as an administrator. I also drop any firewalls out side of vista's. If you are the only user on your system,
You will have to right click on Limewire's Icon and select run as administrator.
This opens up file sharing features with in vista. Just like in XP.
Go to Microsoft and search for UAC concearning Vista's Security features.

Hope this helps.. Dr. X