Thanks Andy. I can now run both 32bit and 64bit apps in my AMD PhenomII X6 1090T using AnV_Qoopz_xnu_10.4.0_Rel4.zip, AMD_sysenter_10.6.4_patcher.zip, latest Chameleon2RC5 (rev411) and booting with

arch=i386 busratio=16 cpus=6 maxmem=4096 patcher_opts=2 -force64

For some reason the combination

arch=x86_64 -force64

does not work (instant reboot) and I have not tested yet if 8GB RAM is possible.