autocad 2000.......win7 32 bit..........hp 64 bit

here's one for the group............i have read a lot of posts about ac 2000 and win7 pro running in xpmode........it does and i'm still learnig how use it........the curser has an arrow at the crosshair,which no one has been able to get rid of,that i have read so far.......but here is my question........can ac2k a 32bit....and win7 32bit........run on a hp 64bit desltop...w/amd v chip.......without having to run in the xpmode......and what happens to 8gigs of ram......does it only see 4gigs........thanx........