Wow, thank you! Quite not that easy system, as it is on my old Korg Triton:)
...Yeah, I just tried to experiment and registered a MIDI Song into one of the Registration Memory Elements, but after that the Song appeared to be in all other 7 Reg. Memory Elements. I guess it might be useful, if you use the whole Registration bank for the same Song, but I use only 1 Reg. Memory Element per Song.
Thank you very much, again!