Go to Control Panel/Adminstrative Tools/Computer Management/Disk Manager and find you DVD. Right click and find the option to change the drive letter. Move it down the line where it won't get mixed with the rest of your drives and hopefully it will stick. Good luck.
Okay , I'm tired of trying to save info to my DVD writer and finding the designation has changed again.
How do I lock the designation in place and keep XP from deciding that it's E today and L tomorrow?