Both FIBS clients, GNUbg, Snowie and online services like GammOnLine, Yahoo!
Games and MSN Games work just fine with Vista. Is there a particular
application or service that causes you problems?
I suggest you post in rec.games.backgammon to get specialised advice:
As I wrote, I want to use the applications from Windows XP in Vista - Is
this possible? Anyway, I have posted this question in the game section
instead, where I believe it is better suited...