Alright... that's done and I think it was actually worth it in this case to take the "long way 'round"... by which I mean manually moving the rows of notes to the correct spot in PRV.
 
As I said this is someone else' drum file created in EZD. Doing this this way (moving the notes in PRV) with just an unknown MIDI drum file would have been stupid. HOWEVER in this case I was fortunate to have not only a mixdown of the entire song (well actually multiple mixdowns I created and bus stems of everything) I had a stereo mixdown of JUST the original EZD performance provided to me by the composer.
 
That meant I could solo that stereo mix of the original drums created in EZD and use it as a reference to move notes in my PRV MIDI clip so it all matches up by ear. As I said if I didn't have an audio reference then a map would have definitely been better to avoid guessing what was supposed to be what.
 
The extreme advantage of all this (aside from getting a chance to poke around in AD2 and the PRV for extra experience) was simply getting right into the MIDI clip and looking at all the hits. With just a map I may not have really seen a bunch of double/errant triggers and I got more familiar with the performance.
 
It was annoying jumping back and forth between the AD2 Key Map, the PRV and the TV (for soloing/muting the audio ref/MIDI tracks) and the two octave discrepancy was annoying but I've become more intimate with the part and came up with some good ideas for various things... AND of course I learned some extra stuff forcing the issue in the PRV (and I actually haven't used the new updated PRV much since Splat came out so that was good too).
 
Anyway... all mapped, learned lots from the thread and just muscling through it, drums are sounding fuxxored (using an old shool Grtsch kit for a hyper modern metal song is filled with teh lulz) but as I cruised around kit presets they all obeyed the notes well so now I can just create my own custom kit and mix it.
 
Excellent.
 
Of course if anyone has more tricks and tips no reason not to post them just because I got this sorted.
 
Cheers.

And this is why the first thing you should do with any drum synth is configure it to use the GM drum layout. ;) Then all you have to do is map the handful of unhandled kit pieces. We should probably also lobby the drum synth manufacturers to agree on a useful extended standard for pop/rock percussion - i.e. one without timbale and congas but with more cymbal slots, left and right kick drums, etc.
 
I did actually have to do this the other way around - Addictive Drums 2 MIDI to Superior Drummer 2 triggers - and what I did was take my existing SD2 drum map, play AD2 drums through it, and consult the manuals to see which mappings I'd need to change. This was quite annoying because sometimes I'd change one drum to use a note that was already assigned, and other times an entry remained in the drum map that didn't actually do anything.
 
In hindsight, a better way would have been to write out each kit's mapping in 2 columns (or print them out, whatever), then draw lines between the two to show how I would want to map them, based on my understanding of the different kits. Then, create a fresh drum map where I only create an entry specifically for the MIDI notes that exist in the clip I want to play back, consulting my cross-reference diagram for how to do it. If I then added more clips which use more of the kit, Sonar will show them as unmapped, and I can consult the diagram to see how to fix them. That way, I'm not wasting time mapping hits that aren't going to get used (eg. Crash Cymbal 6 or whatever).

I started comparing the mapping from an AD2 kit to an EZD2 kit.  It looked simple until I dug further and found the same kit piece assigned different slots between kits by the same vendor.
 
Because of where I'm at and likely to go with this stuff, I will prolly end up with a ton of dust on the XLN stuff while I invest more in Toontracks.
 
Life's to short to spend precious time futzing about with this stuff.
 
The only other option I can think of is to buy MIDI from a 3rd party that includes formats/mappings for both.  I haven't really checked that option out yet though.

would this be useful?

http://midifilemapper.codeplex.com

Elffin
would this be useful?

http://midifilemapper.codeplex.com

Not sure, but I'll sure check it out!
 
Thanks