From the step by step guide (http://wiki.osx86project.org/wiki/in...y_AMD_10_5_2):
15) Choose a Partition scheme of 1 Partition, name the drive "Leopard" and choose the Journaled File System (not case-sensitive). Now there will be a button labeled "Options" below the big rectangle representing your drive. Click that.
16) On the resulting window, make sure MBR is checked. I realize Kalyway claims GUID will work, but its only tested on Intel. MBR worked for me, so its what I recommend.