I just ignore that. There has been a size-limit indeed, but if you own XP and use the CD's for yourself, then go ahead and try to burn one. You'll see it is only one of those warnings to create something that is widely useable. Never had a problem with it myself. If otherwise, you'll have to rename the names that are too long, or accept an abbreviation.

I have tried prudent planning long enough. From now I'll be mad. (Rumi)