thanks for the quick response appleguru, it's been awhile, but i don't remember what version my xbox360 fw is that i am using, i believe its xtreme 4.1a or so? So if thats the case, do i still need to update my xbox's fw or should i reflash my pioneer dvr-109 burner?
if the answer to my question is the latter, where can i find the firmware that will bitset DVD+R DL to DVD-ROM on my pioneer dvr-109. I really don't want to end up bricking my burner in my g5...

to mmr, yes i believe so? I am using a windows machine to make an image of my backups using xbox 360 backup creator and a samsung dvd-rom drive with a patch that will allow it to read xbox360 media.
Either solution will likely work fine, though it's probablly best just to reflash your burner...
First, I need to know what firmware your burner has on it at the moment.. You can check in apple system profiler.