Two keys for one action

Didn't really know where to put it so I hope it's okay here.

Anyway, I want to bind "Jump" to two keys (space and scroll up) but the ingame option doesn't offer this and I don't know if I can change that in a config file (looked but couldn't find anything).

Has anyone an idea where I might find this or if this option even exists?

Thanks.

Actually, I think this is the correct place for changing input settings, found in another thread:

Edit: wrong input thread

Yes, Akutare has it right.

Too bad the camera wasn't rolling!

Curses!

Appreciated, though the game doesn't seem to care what I tell it to do.

Well I will have to play a little bit with that. Still, thanks.