What I have set up (for multiplayer), is the same keys for forces on the light and dark sides. There's too many buttons to map them all on a single keyboard map, so this is more convenient.
Just make two files with the bindings for light and dark, then replace some quick keys in jk2mpconfig.cfg:
bind F1 "exec lightforcekeys.cfg"
bind F2 "exec darkforcekeys.cfg"
Then hit the appropriate key (F1 or F2 in my case) after you've reconfigured your force powers.
As to what keys I use, I have push on the right mouse button always... yeah I use it a lot
I also have the sabre stance toggle on my thumb button, I have a 5 button mouse