Drumwerks samples and Session Drummer 2

I just purchased a couple of drumkit sample sets from Drumwerks, and, much to my chagrin, there's no "automatic" way to load them into Session Drummer 2 as a kit, in other words, no .prog file. Anyone know what hoops I need to jump through? It's important that I have the multi-sampling thang goin' on, too - no dimensionless hits for me!
 
I've got SONAR 7 Producer, running Vista 32.
 
Thanks in advance.
 

Okay, I get what you're saying, and thanks, but what I was trying to do is actually get the kits already mapped. Surely someone out in CakeLand has mapped these.
 
I get that I can reverse-engineer the existing .sfz files, but when, for example, the drumkit that comes with Session Drummer 2 has 10 steps of velocity, the samples I got from Drumwerks have, like, 27 different samples. So I don't know how to map all that, with the variables available.
 
And sadly, the Drumwerks people do not give you a clue on how to do this, let alone not mentioning that these samples are completely without any format.
 
So if you (or anyone) can think of anything else, I'd appreciate it.