where is program registration held (like resco)?

[SyXbiT]

i'm using PIMBackup, and, with so much flashing to different ROMs, it's a real pain to have to re-register everything.
I just noticed that in PIMBackup you can add folders, so I figured if I could select the right folders that contained all the registration info, I'd save a bunch of time.
i tried backing up the folders in Application Data, but that didn't work.
any ideas?
I use PI Calendar, pTravelAlarm and Resco Exlorer/Pro Photos.
any ideas, thanks
(it isn't so bad with resco's code being short, but PI's is 16 chars. a real pain, especially when i am trying to do it in class )