I have a G4 PowerBook that has been acting up for a while. It finally got to the point where it won't even boot up (it turns on and gets stuck at the little apple logo.) I've have all the finals I need off of it and have tried a few times to reinstall OSX 10.4 from the install discs (erase and install) and each time it gets to a point while installing, stops and tells me, "There were errors installing the software. Please try installing again." Anyone have any idea what's going on?