Not much of a solution, but ive been trying freedrive, which is virtually identical to map monkey, and still based on destinator d3, you way want to try it, this doesnt appear to have this problem, as it has a decent on screen keyboard...
heres the link:
www.freedrive.co.uk
you will need to register on the forums to be able to download anything, worth a try. I have map monkey installed as well, and they dont appear to intefere with each other, so you can switch back if you dont like

, just change your rrconfig to the directory you install it to