I have one of those drives They are old so no good buying recent media for them look for some 4x media also try 8x media
Either way try burning everything @4x.
Try burning one of your CMC @ 4X see what happens.
MCSE will do it Cynthia
As in allow to flash backwards if MCSE has no support for 110 dvrflash will work
http://ala42.cdfreaks.com/MCSE/
download latest version, download 110 firmware and flasher, load flasher into MCSE tick the box allow same to same etc
You could also try some newer media as ritek G04 are not the newest and that pioneer drive will no really be expecting to see that media in use.
Try some newer TYG02 or MCC 02RG02
You could just go and buy the same brand / model number you had if its still available.
Most cheap DVD players will play mp3 from DVD all of mine do.
Depends where you live as to what brands may be available
I used stock for a few days and it gets very hot.
I bought an artic 7 freezer pro which cost me about £15 and it does a stunning job or it did. Not checked temps recently , gonna have to check em now I'll be back
http://www.arctic-cooling.com/cpu2.php?idx=79