Yes, i have tried the safe-mode and the ram restart... neither worked. I was trying to install Snow Leopard on my MacBook Pro, but after a few minutes of installing, the screen went to a white (very pale grey?) screen with the Apple logo. That's all... no mouse, no keyboard, no nothing. Nor is there a pinwheel or whirly thing (as they are called by really cool people (: ) or any other animation other than the stoic grey Apple logo. Further more, i cannot remove the...