tbh ,
Dual Core Or Quad
2GB Ram MINIMUM
320GB internal 500GB External
256MB graphics (pushin it But yea it will work) Not onboard, get external
Sound card, AC97 FTW!!!
Wide Screen moniter
Windows Media player 10:P just uninstall it then download this one
and the Orginal Copy of Vista
Vista would adapt itself so it would work optimized for a shitty computer too so these requierments is only if you want to have a optimized experience which is not really needed. To be honest I use Vista 32 bits version legal copy on my shitty computers they run fine:), I like the new memory from flashdrive feature and the ability to steal a bit of memory from the ram to put onto the graphicard

,
Keep it LEGAL! Im havin all my softwares from Microsoft legal no need to use illegal copies