hey everyone i just installed the dev version of lion on my spring 2011 mbp. i got the run around but finaly installed it. it sucked rlly bad. so i wanted to uninstall it and reinstall snow leopard. so i put the disk in, the window opens up, i it on the installer, then a window poped up and said "this application cannot be installed on 10.7". so i look around the internet franticaly looking for a solution. one guy suggested that i should insert the disk, go to sytm prefs, and select the disk as the start-up disk. then i restarted the comp. it turned off then on. i could hear the disk running but then it just went to that gray screen with the apple and has stayed their for the last half an hour. i have tried force shut-off. and it turns on and just stays at the gray apple. and btw i didnt back any of my stuff up so P L E A S E I honestly BEG: SOMEONE PLEASE HELP! im freaking out!