I've not used the method, beyond testing that it worked...
ie., use a button/key as a hotkey to disable an entire Key Map and enable a different Key Map, while the key is held.
You could do it as a toggle.
Still two steps, but not enable/disable on press or release.
Enable it, do your alternate stuff.
Then disable it.
Not really sure on how well that will work, but its an option to try.
My roommate is left handed as well.
He uses the arrow keys (right hand) for the main to move alone, interchangeably with the right/left button pressing on the mouse (left hand).
The slaves are on follow.
With nothing for slave independent movement.
But does have the Spread Out key.
And has Down Arrow (to everyone), in one of his keys... specifically to stop run-off-IWT-Melees from going too far.
You can (assuming you're using IS Boxer)...
Create a bunch of Click Bars.
Make the button around 40x40 (pixels), which is close to the size of a Warcraft button in game.
Make it transparent and place it over a button.
Or give it a black/white color (background) and the revese (for contrast) as text with a very short abbreviation.
Set the Click Bar to Target: Current Window.
But drag the desired mapped key onto it (in the Toolkit, on the Clickbar interface).
In game, you'll need to open the GUI interface, and on the Clickbar tab, Show All.... position them and hide the ones you don't want.
Thereafter, you can mouse click to do things.
Possibly have Toon A moves left, Toon B moves right, or whatever.... when this button is clicked.
Might need to use Hold Keystroke while Hotkey is Held; not sure on the interaction of that with a clickbar as I don't use those often in my setup.
But that's another direction to investigate.
