Steve,
I bought Reel Machines and was automatically upgraded to AD2 (it comes with it). Essentially, all the new ADpaks only work on AD2. With X3 Producer, which I upgraded back in the spring, I should have received the free upgrade that was part of the X3 promotion. Unfortunately, it did not happen. I never used Addictive Drums until recently. I want to really simplify my beat production (I'm tired of complex drum synths!) so using AD(1/2) makes sense. To make a long story short, the folks over at XLN Audio hooked me up. Upon review of my account, there was some sort of error, and they corrected it. So as of now, here's what's in my AD2 library:
1. Reel Machines (purchased)
2. Fairfax Vol. 1 (demo)
3. Studio Prog (full, came with upgrade)
4. Studio Pop (full, came with upgrade)
5. Studio Rock (full, came with upgrade)
I think that the Studio Prog/Pop/Rock kits are the kits from AD1 but modernized to work in the AD2 engine. The "Sonor" kick drum is in there, and that is familiar to the AD1 engine.