just got my macbook, 2006 model, and i decided that i wasnt happy with the snow leopard os on it so i decided to clone from my desktop, macpro 20006, i ran disk utility and erased the macbook HD twice then clone my lion to it. when i restarted up my macbook pro all i got was a grey screen with a circle and a line in it. i then held down the option key and started and got the HD icon but cant launch it. am i going to need to buy a install disk and if so which system would i need to get, snow leopard ?