I have a 13" white macbook with leopard on it that I got about 2 years ago. Anyway, the other day I was cleaning stuff I didn't need anymore off it and I somehow accidentally moved the "library" folder that's in the "system" folder in to the trash. I tried removing it but it wouldn't let me, then my mac froze and I restarted and it just showed the Apple logo while flashing an anti-logo and a folder with a question mark on it. I took it to the Genius bar and the guy asked me if I had my files backed up and I said no, but he told me a way I could back them up on my girlfriend's mac using a fire cable and then just reformat it myself. So I bought the cable and put the files on my girflriend's mac. However, now when I'm trying to reformat it from the installer disk, it doesn't seem to be working. It shows the Apple logo and the loading gear underneath and then it switches to that anti-logo (circle with slash through it) and the loading gear continues. I let it run like this all night but still no change. I tried resetting the PRAM and other things. I've held C and held D to run a hardware test and it says there are no problems. I've held Alt/Opt and it recognizes the disk but it doesn't seem to load anything from it. Is there something I'm doing wrong? Any help would be greatly appreciated.