Yes, Jay,
have used easy cd burning method via drag to cd method with both Roxio and WinXP Pro/SP2. I'm not advising you to back-up your clients data using this "easy" method, because of often problems like yours.
Always after fresh system installing all works fine, but after short time they just burn saying "all fine". But after that "fine burning" the same writer or other cd/dvd readers aren't able to read from disc (at once to slow).
The best method for me is creating/burning "data cd" for all(main types) kind of files via Nero.