are you using a kext for sata support?
also, I get weird issues if I rebuild extensions.mkext
so i delete them and boot works fine, though I want to get that issue resolved as extensions.mkext in /system/library and /extra/extensions supposidly make boot up faster
I included as an attachment few of the kexts that helped me get amd snow off the gound. you could try them and see if they help. I use a smbios and dsdt as well, but its for my system specifically so yo might need to make one yourself. I forget what guide I used to make it, if you like I can search through my bookmarks for it
also included a snow leopard version of dsdt patcher and kext utility, incase they help
NullCPUPowerManagement.kext is the disabler for the cpupower one that guy told you to delete. I didn't delete mine, as I use this kext for that purpose. You could try putting that one back, and this into /Extra/Extensions
fakesmc.kext is used instead of dsmos, you need it if you don't allready
VoodooPower.kext is from leopard but I used it just incase, not sure if it helps
OpenHaltRestart.kext is needed
Disabler.kext is needed
AppleUpstreamUserClientDisabler.kext is for amd/nvidia mouse issues, you might skip it unless you get mouse in itunes and whatnot
these are all in my /Extra/Extensions folder, with the SMBios.plist as well.
THen I have dsdt.aml in /
also, are you using a custom made dsdt? If not, make one in leopard and put it into the snow root directory, assuming you have chameleon rc3 or better with dsdt support
these are two of the guides that helped me, I jumped around between like 20, so I can share more if you like, though you might get lost like I did for several days
http://www.teknojunkie.com/2009/09/h...ard-on-pc-amd/
http://www.infinitemac.com/f57/amd-s...install-t3727/