This could be possible by recording into the MuliPads. Pad1 Intro. Pads2 Drums. Pad3 Bass. Pad4 Ending. I have recorded 16 bar looped Riff's into the 4 Pads without problems. You can then just trigger any or all of the pads you want the PSR to playback.
If you record a Midi File 12 Bars. Save As .mid.
Change the extension to .pad.
Put this .pad file into a Folder (Name) .usr. (The .usr Extension on the 2000 may be different)
LOAD FROM DISK. Select Individual and place into a Pad Bank of your choice.

Graham UK