Hello, I'm completely new to everything. I already had OSX running once, but somehow, the computer disappeared. Anyway, I'd like to know what hardware I have to use, I've got four PCs here:

MSI GF615M-P33 + AMD Athlon II X4 630

ASRock 880G Extreme3 + AMD Phenom II X4 965

FOXCONN A74MX + AMD Athlon X2 6000+

Intel D915GAG + Pentium 4, 3,00GHz, no HT

Graphics Cards: nVidia GT140, 6600 512MB, GTS450

And loads of S-ATA HDDs.

What should my Hackintosh consist of?

And secondly; What distribution do I have to use? And where can I download it?

Thank you in advance,
Kasumi