Here's a better description of my problem. My DVD drive functions as it should when I boot into Safe Mode, however in normal mode I cannot read any discs other that audio CDs. My guess is that XP is loading a conflicting driver, or there is a Service causing the problem.
I've gone through all the obvious steps (checked cables, jumpers and hardware), unistalled all burning software, removed all other hardware except for the monitor, mouse and keyboard and cleaned the device manager. Any ideas??????