Semi-related...a bit of a disappointment I've had with these guys (in spite of excellent software and mostly great support)
Three of the Adpaks (Studio Pop, Studio Rock, and Studio Prog) are actually the kits you got in AD1, remade into Adpaks for AD2. Owners of AD1 who upgrade(d) to AD2 get those three paks automatically.
For those of us who actually did own AD1 through an earlier version of Sonar and then got AD2 with Platinum are part of an apparent curious exception to that rule. We apparently have to pay full price for those paks to add back in kits we already own, or pay for an "upgrade" to AD2, even though we already own the full version.
Anyway, great software, but that was a disappointing call for them to make.