Ahh cool, seems I'm in better shape than I thought - hopefully it doesn't puke on the CPU I have, otherwise the partslist I cobbled together seems fairly compatible.
A8N SLI - AMD X2 4200+ dual core
2 GB RAM
500 GB SATA HD, SATA and IDE optical drives
and my choice of a nVidia 5200, 5900 or a ATI 9200 to throw into it, PCI.
Wish me luck, and thanks for the help guys!