osu! InGame Background Changer (aka osu!ibc)

Summary

DLL (comes with injector) that changes every loaded background to one you specify. Allows for temporary change of backgrounds without having to edit any files. Also allows you to make osu! think all backgrounds are removed, if you're into that sort of thing.

How to use

1. Start up osu!
2. Start the injector
3. Load an image
4. ???
5. Profit!

You can now hold the O and P key for 5 seconds to open the menu again.