Changing pre-set hotkeys?

Is it possible to change the pre-set coded hotkeys for default commands like stop, attack and the # keys?

Also is it possible to have a trigger activate upon pressing keys other then the directional arrow keys?

Only by tracking which order was assigned and you figure out which hotkey it has assinged.

Example: You have a custom ability called Move Up, with U assigned as hotkey. When the player casts "Move up", it means he pressed 'U' (or perhaps the button assigned to the ability). Just detect when he does that.

But say, for my directional movement system, I want to use A,S,D,W

A and S are already used by attack and stop