I managed to get Snow Leopard installed but now when i try to boot the drive I get an error, it's a circle with a slash through it, I know i can use the v flag to find out what's going on but I'm not sure how to start it.I use CHAMELEON to select my drive,do i press alt -v after i select the drive.I'm not really sure how to input the command or if that is even the right command