download transmac from www.asy.com/sharetm.htm. restore you dmg to the pendrive and download a chamaleon iso and burn it to a cd boot chameleon cd with the pendrive inserted on the computer and install.
i found d620slv1.iso and works great, i've installed with snow leopard 10.6.6i by hazard without drvers,bootloader an patchs,after i boot with the d620slv1.iso and run postinstall.command in the root of the cd and all works great.