Apologies for my apparent opacity.
The problem, it seems, was that, when I first installed Jamstix and pointed Reaper to it, in pointing it to the entire install folder rather than the data folder, Reaper couldn't seem to find the data. Consequently, when I installed new kits, it created a folder for them in a subfolder deep in the admin's AppData folder. I probably should have explained this in more detail, but I merely took it as given that, for some reason, this is where JS placed the data in Vista.
After finally running a few tests to see how programs fare when installed on another partition (because I was-- for some reason-- sure that that was not a viable option), I managed to actually free up some drive space and simply moved JS to that partition. I pointed Reaper to the data folder, everything installed, entered license codes, and so far, everything's sugar for the limited user now.
Thanks for responding with anything besides "...you idiot"!
