I want to install Leopard on my desktop - Later to be upgraded to snow leopard from what I have read. I don't know which distribution i should pick or how to precisely install it. (Tried kalyway 10.5.2 on a laptop, installed fine, but when i rebooted nothing happened)

The computer I want to install it on is an HP Pavillion m9163.sc.

Specs:
nvidia 8500gt 512mb pci
AMD Athlon 64 x2 dualcore processor 4200+
Hauppauge WinTV HVR-1200 (model 71xxx, Hybrid DVB-T, No FP)
Liteon Wireless 802.11 b/g
Nvidia nForce Serial ATA Controller
WDC WD5000AAKS-65YGAO
ATAPI DVD A DH16A3L

Motherboard... not sure.