[solved] Change backgrounds in middle stage

[Boop]

There is an address which stores the current background, you need to write to it. The problem is that writing to it while a game is running will cause lf2 to crash. You will have to write to it while the screen is black and lf2 is loading the next sub-stage, and even then I don't know if it won't crash.

http://www.lf-empire.de/forum/showthread.php?tid=867

I did something similiar in boss mode. All boss fights are stage 6, yet each of them have a different background. Except the background is selected before you start the stage, not during.