I have been mulling this over all morning and poking at the project (as I've been prattling on about other stuff here on the forum). I woke up and the solution was clear to me...
I was just going to create my own map inside AD2 based on the performance and then tweak it a bit to make any MIDI editing I do more convenient (like I'd remap all the snare and hi hat artics to all be bunched together... crap like that).
However, although it is indeed a hit heavy MIDI clip it is not a particularly complex clip articulation-wise. So I am defaulting to simply using the default AD2 MIDI map and within PRV just dragging the rows of notes to where they need to be (so they will trigger the kit piece I want).
In this particular situation, since there are really only under a dozen distinct notes in the clip (repeated many times of course) and many of the notes are already mapped correctly I think this will actually result in less work and headache than creating my own map or even downloading, transferring and installing a custom map (which I may need to futz with anyway).
Of course this is only the current plan and for other more complex material I will want to try other options so this is still an open general thread and query.
All ideas help me (if not immediately then in the future) and it's a good online archive for folks trying to do wimilar stuff.
Awesome. I'll update once I get this sorted (if at all but it's pretty simple and I've done this particular approach bfore).
Cheers.