Hi, I think my macbook had a problem while installing a recent update, and now it always gets stuck during startup (at gray screen with the apple logo). I've tried using disk utility to repair disk/permissions as well as going into single-user mode and running fsck -f, both to no avail. Tried booting in safe mode, but it fails. Now, there's a couple of things I'm wondering... 1. I've read that installing a combo update can sometimes correct damage caused during updates, but is there any way I can install it pre-startup (via a flash drive or something)? 2. My next option would be to archive and install, but will this work if I only have my original OS X install disc which is 10.4 (and I'm currently running 10.6)? And will I lose anything on my HDD in the process?? Any advice/help would be much appreciated, thanks.