Try using google to search for compatible adapters. Either that or look at
the various adapters available and note whether any are Vista compatible.
Manufacturer's web sites are also a good source for this information. I've
noted that the vendor newegg (www.newegg.com) has a lot of computer related
hardware for sale. You could check their site to see what they have in the
way of wireless adapters for Vista. Just some thoughts.