[RM2K] Using other keys?

Is it possible to have an event that does one thing if you press the enter key, but does another when pressing another key?

For instance, if you want to play a minigame with someone, press the "m" button to ask them to play, while pressing enter still talks to them.

Or to group people, press "g" to ask them to group with you.

Possible using passwords, something else, or not at all?