if I would use my Audya as a "professionell" ( Iīm only a "home-player" ) I would arrange my registrations in "decades".
That means :
0010 Song 1
0020 Song 2
0030 Song 3
and so on.
If you need more that one registration for a song just numer them with single steps.
0040 A swinging safari 1 ( flutes right hand, Style-Variation A )
0041 A swinging safari 2 ( strings with harmonizer right hand, Variation B )
0042 A swinging safari 3 ( trumpet right hand, Variation C )
Only sound at : http://www.youtube.com/watch?v=NtCKFX3EVVg
0050 Rock around the clock 1 (GrowlSax, SyncStart,SyncStop, Variation A )
0051 Rock around the clock 2 ( BlownSax, Variation B )
0052 Rock around the clock 3 ( Rock Guitar, Variation C )
and so on ...