Changing direction a little bit here, but all of a sudden I'm having trouble burning a cd in iTunes. It's not my burner because Windows Media burns a CD just fine, but what I want to make a CD of is in iTunes. I get a 4450 error? Any ideas?

Its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

One user found the CD media was the culprit in his case, and switching to another brand fixed the problem AND resulted in better record time. Source (http://www.marshu.com/design-computer-tips-tricks-fixes-itunes-4450.php)

Others suggested the problem might be with corrupted mp3s or attempts to burn CDs with songs on the playlist you've already burned a number of times. Source (http://ask.metafilter.com/30043/CD-burning-from-iTunes)