Ok, here's my next problem *sigh*, not like i didn't expect it

So, i followed SaCleoCheater's tutorial, and everything succeeded successfully...or so I thought. I rebooted and I selected my Snow Leopard Partition in the darwin bootloader and it says it's Loading darwin/x86 then it blinks a cursor..and the entire thing freezes...and sometimes my display goes all funny too. Anybody have a soloution? Any help would be appreciated

I have tried many combinations of boot flags, but none of the worked