I decided to use my developer account to download DP4 of Lion. I downloaded it and decided to install it over Snow Leopard expecting it to work well since its fairly far into development. It went into the installer after restarting and soon after said installation failed. The SL partition has been turned into an OS X install partition I can't get past. I ran disk utility through there and the disk needs repairing, however whenever I boot into my SL disk the iMac brings up the message that it needs to be restarted. What do I do?