simplex, where did you order it from?
did you order an original import or an import backup, if it's the second than it was known it had to be a pressed copy, they're the only one that work...
I use a mod-chip so i can't tell you about sm3 but if the pressed one don't work, i doubt the original will...
Not yet, at least with GT4. No one knows how to downsample it yet, can't compress it, and the original is PTP (Parallel Track Path meaning that it reads both layers from inside to outside), DVD+R DL is OTP (Opposite Track Path meaning first layer is inside to outside, second layer is outside to inside). Keep checking the threads though, I'm confident someone will get it eventually.