try what i said and it will fix it. I saw a thread u made in Insanelymac and people there said the same thing. i would recomend since you broke the install already, to do a clean install again. Once your done with your install, boot in safe mode [ -x ] and repair your permissions through kext utility.

im guessing you have the "No installer package" error in diskutility. Once you get your install up and running with no errors i suggest you do another clean install within your snow leo to another hardrive to solve installer packages issues. For some reason if you install from Leopard you get the installer packages error, but if you install from a SL system it fixes the problem and u can repair permissions through diskutility without the need of kext utility.