My CD/DVD drives were not listed in My Computer. I checked the Device Manager and it reports the drivers are corrupt. After much searching I found a Microsoft Support page FixIt tool:
http://support.microsoft.com/mats/cd_dvd_drive_problems/en-us
After running this tool, with Administrator creds, it found an fixed my driver issue. You need XP SP3 or better to use this tool. Enjoy
