I'm currently assisting my computer-illiterate friend with some technical issues he is having with his 15" 867mhz PB. His combo is currently pretty jacked up. I've spent some time with it and I can almost never get it to burn any cd's. If I try to burn an audio CD in iTunes, 9 times out of 10 it will cancel the burn halfway through and give a message that says the disc is unusuable or unreadable. The 10th time, the disc may burn, but it sound warbly when I play it in a cd player. The combo drive also will not burn CD's from the finder. It did however, manage to burn a data disc from iTunes after 3 attempts. I've repaired permissions, done a clean reinstall, purchased a cleaner for the combo drive, tried using several different brands of cd-r's, tried every burn speed, and nothing seems to work. I've given up on this combo drive and want to just replace it and make it as simple as possible for my friend to burn cd's. Should I replace the combo drive? How difficult is it to open up the PB (it's 2 1/2 years old so I'm not worried about any warranties) and replace the drive? Could I set up an external burner that would be user friendly for my friend? Any help would be appreciated!