I experience it the same problem, the solution is to boot with -x flag, and than you get into the system at the first boot. If you install Voodoo Kernel, u must install also the SeatBelt Kext in the installation menu. You'll find it in the fix folder at the installation.
Follow the instruction to install, i use the same motherboard, my system is :
MSI K9A2-CF
AMD Athlon Black Edition 7750, stable on 3,1Ghz
AData Extreme 800, stable 920, 8 G, up to 1066
HD Samsung Spin Point 750Gb, 7200rpm, 32Mb Cache
Nvidia 9800 GTX+
If problem continues, please contact me, i had exactely the same problem with installation.
And btw, don't patch anything, the system on dvd works flawlessly if you install it corectly.
Cheers
SeedStar