You also need to remember to burn the CD-RW at a SLOW speed. If you burn at 4x or lower, you will have better success aith the Thompson.
Personally, I use Maxell CD-RWs burned at 4x. They work on ALL Xbox drives.
Incidentally, the only problem that I have found with the awesome Samsung drives is that they are actually WORSE than the Thompson at reading DVD+R media! Other than that they pretty much read everything, including almost any CD-R media.