OK, I've just sorted out a bug, that made it useless, but it seems to work now.

Anyway: It still needs some testing and I need some volunteers to help me sort out remaining bugs and to check, if I didn't miss anything the installation-manual.

Important note: It hasn't been fully tested so its strongly recommended to backup first.

OK, what does it do and how does it work? Well, usually you move or prune threads manually from time to time, but with this hack you can add the options you've chosen as a cronjob, that does the work for you. It even works, if no matching threads were found. If you want to manage these crons, you can check the new option added to the 'Threads & Posts'-Group in your AdminCP. However, you can only view and delete crons there atm. (See screenshots)

PS: I'd recommend to run the mass-move or mass-prune action manually the first time, because the first run may be very intensive.