Hi i have an acer aspire 5738g

Intel PM45 chipset
T6600 C2D
ATI 4570 mobility

I've tried getting the chameleon bootloader to load the retail snow leopard disc but when i put the snow leopard disc in after the chameleon screen i just get a gray screen, can hear it loading from the disc but the graphcis simply dont work, what do i need to change in the bootloader to get it working so i can actually get to install?