Well, my gut feeling is that you are right, the 4163 is doing nothing wrong, but there's probably something about its new-fangled, "multi-writer" firmware that is confusing the four-year old Spruce software. I was hoping someone might know of a way to work around the problem by getting ones hands dirty at the system level, setting a bit or something to force the aged Spruce software to correctly acknowledge a DVD-RW as a DVD-RW and not as a CD-R; this problem is causing the media to be rejected before the burn process even begins.
I still have a few more things to try:
o Write intermediate image to HDD and burn to 4163 using Nero
(first need to reformat as NTFS to allow writing the >4GB image)
o Try burning with DVD+RW, +R, -R and DVD-RAM in the 4163
(so far only tried DVD-RW)
The first option might not be so bad as it seems; while it's not great having to create the intermediate image file, I would still save time burning at the significantly higher speed of the 4163 than "on the fly"
to the old DVR-A03, and I also understand it's advisable to create a disc image when burning to DL media anyway to avoid creating coasters...
My gut feeling is that no matter what media I throw at it, however, any
DVD media will be reported as being CD-sized...but no way to be sure
until I've tried it.