im using a MC700LL/A with lion installed on main partiton. Nothing else is on it. I tried to boot BT 4 or 5, just TRYING to boot from live cd and i get this... same cd boots FINE with no problems on my gateway laptop. not sure what the problem is. i will post a pic of what im getting ( im not using any special boot methods, so if i need to please correct me. ) thanks !