rebug doesnt do data transfer
and im almost sure that u cant data transfer to a lower firmware ps3 (not 100% though)
i dnt think psn dlc will work as its activated to the ps3 "CONSOLE ID" when downloading from the store
well i have managed to do a data transfer from my 3.66 slim to my 3.55 slim by re-installing wutangrza firmware and the geohot, then activating the spoof for it, allowing me to do the data transfer from my 3.66 to 3.55, but i have ran into another snag, when re-updating to rebug 3.55.2 i am getting a firmware error and being forced into reinstalling the firmware both with the 2.0.pkg and without......