All credits goes to AnV, I just though I'd upload them here so they will be accessible after the rapidshare links dies of old age or cancer. This is the first AMD capable kernel that allows you to use 32bit software along with 64bit so it basically has the same functionality as a mac booted in 32 bit, you're still stuck with 32bit kexts but its a hell of a improvement and its getting close to be as usable on AMD systems as Leopard. Enjoy!
Be careful to RTFM, in order to boot you'll have to at least add to your  /Library/Preferences/SystemConfiguration/com.apple.Boot.plist Kernel Flags: patcher_opts=2 , also consider to add arch=i386 -force64