Thanks Guys. Yes, I did only check my Liteon DVD burner DMA. I didn't realise that the DC-ROM drive DMA would affect the DVD drive. I did burn 6 other DVD's without a hitch. What I need know is a Windows XP Pro log so that I can get my PC to boot normally. I think I might have to reinstall Roxio to solve that problem !!
You may want to restore XP back to when it worked. After that, try running the Nero tools. http://nero.com/us/Driver_CleanTool_and_RegistryChecker.html