At a loss for Mac on my homebuilt PC

[Haldier]

I have a homebuilt MSI K9A2 CF motherboard.
AMD Athlon 64X2 5000+
AMD 790X Chipset
Nvidea 9800 GT main card
Nvidea 8800 GT secondary card


I get the install of lawlessppc and Leo4all to go all the way through the install process, and yet at restart both hang at almost the same time... all the other computers in the house are Apple except my Tower.

How do i make this work? my next upgrade for my tower was supposed to be a new quad core processor but if this wont run a dual core i am not ready to try quad core, i would prefer to just have it running mac.