I'm doing a clean install on my iMac, and when I get to the second disk, it goes through everything all the way up until iLife sounds, and it suddenly tells me that there were errors during install and to try again. I've done this twice, and it's going again on its third time, but I don't know how it will go. It doesn't make sense though cause I've reinstalled before, and the disk worked fine, and it doesn't look scratched (I've always kept it in it's case). What's going on here? Please help!