This happened to me before I took the machine in and came home and reinstalled the OS, I downloaded the CS2 trial three different times and continually got a generic "There were errors installing the software. Please try installing again" error. I thought it had something to do with the fact that I installed CS3 first and assumed I'd have no trouble this time after reinstalling the OS, but I was wrong. Same stupid error again. Last time the Adobe guy had me start the machine with the shift key down and I was able to install it, but the tech at the Apple store said that was a bad idea. So what do I do?