...I think that is not too hard for you to stop SS put the new setting in the registry and start SS again.
You are right. Now that I found out how to pass keystrokes to the aquarium this might actually work, provided that I can get the timing right. Especially applying the starfish could be a bottleneck here because it still requires an external windows program (regedit). And we would not want long pauses between unloading and reloading. Also there would have to be a routine that checks if the aquarium is still running... Hmm, it might be a little harder than we thought but I'll give it a try.