do you like that cooler? i've been looking into getting a new one, and that was one that i was looking at.
i just bought the 650w version of that silverstone psu - it's a fantastic supply as a whole. i LOVE it.
if the game itself doesn't boot at all, go to the website for it and dl the patch for 1.2 - it's got both a patch that should fix the boot issue AND a bootpatch that'll fix it if the first one doesn't. although, i don't remember how witcher works on vista, i've only ran it on xp. it's one of the few games i own that works better on an x64 xp system than anything else, actually.