Have you bought the hardware yet? If not I would suggest you look into something intel based as this will make your life so much easier.

Otherwise, I would probably look at installing using iPC first to get your system running and work out what kexts (drivers) you will need.

You'll need to make sure you install the Voodoo kernel you as are running AMD. Also looking at Newegg, make sure you install support for the SB700 southbridge chipset (otherwise you won't be able to boot) and ALC883 audio. I have no experience with ATI cards so I can't offer a suggestion on that, FYI nvidia is better supported on Leopard. I'll let you work out the rest, otherwise you'll never learn anything...

Long term you should look at going the EFI partition route, as this will make updating your system from Apple Software Update possible.

---

 Mac OS X 10.6.4 Retail || Intel Core2 Duo E8200 2.66GHz || Gigabyte G31M-ES2L || GeForce 6600 GT 128MB || Realtek ALC883 Audio || Realtek RTL8169 LAN || Samsung SpinPoint F1 1TB HD || Sony Dual Layer IDE DVD RW DW-D22A || Apple Aluminium Keyboard || Mighty Mouse

 MacBook Pro || 2.4Ghz Core 2 Duo || 200Gb HD || 2Gb Ram || NVIDIA GeForce 8600M GT

 iPhone 4 || 16Gb