I've been trying to install different Distros but so far i have been unsuccessful.

I have an Alienware Auriora,
Core i7 920
12 gigs DDR 3 1067MHz
ATI Radeon HD 5870 (might be the killer)
Intel x58 motherboard

I have two SATA drives, Windows 7 on one drive and looking to install OSX on the other. Is there anyway to install from a retail DVD, i'd go out and but one today if it were possible?

Many thanks.