Do yourself a favor and just reinstall vista. Do it on another partition if you want to test it out.
May I ask what you liked better about Vista. I had Vista and with no issues, but 7 is mostly the same anyway(with slightly better memory management and start search is a bit better too.).
Last off, MS has already started cutting back Vista support. Hell it does not even get the latest version of IE(easy fix I know, but how long until the stop supporting it entirely)