Dual boot help

[punk_zappa]

Hardware

Biostar TP45HP
E8400
2 GB Ballistix
7900GS

After updating to newer BIOS, Leopard will not boot anymore without KP. Reinstalled and installed Chameleon again, KP again except using BootThink that came with iATKOS. So today I installed SL and it is fine until I installed Chameleon v2 rc1,2,3 at different occasions and SL will KP at boot. Used BootThink and same result. What weird is that it will boot using USB with Chameleon rc1.

After tinkering with it for the afternoon I installed Chameleon v1 with efiv9 boot file. It boots fine now but there's no more Windows option. Is it possible to dual boot using that bootloader?

TIA.