That got my attention :). Sorry I missed your thread; I had a very busy weekend.
Yes it is supported in CG3E. You can use OmniPatcher to check for this. Just load the firmware and scroll the list to the +R9 media.
RITEKD01 is very hard to burn well. The manufacturing process means that the media requires a special strategy and is prone to manufacturing defects. You may be better off with the later firmware like CG5G and CY58 but I have no information as to whether it is better or the same.
Hope this helps...
FYI, your other thread will be removed