Boot osx with -v for verbose boot. What's the last line before it freezes or stops loading. This should give you a clue of what's causing the stall. Also try and boot with cpus=1. See if it works. When you install osx only select minimum kexts. i.e. voodoo kernel for amd. Correct kexts for your mouse and keyboard. Also google for osx86 install guides for AMD CPUs. Audio, Video, network kexts can be installed later.