Hello Maxers,
been off-list for a while but have just completed this tricky little
utility that might be of use to you so thought I’d pass it on.
I’m sure Max5 will be able to do this and there must be other
incarnations of this out there but feel free to try it out.

Put mp.assignment inside a bpatcher.
Connect any input device, hid, midi, asci keyboard, a list of
messages to the inlet
Click the bpatcher, it goes red
Move a fader, press keyboard or move your joystick
This action is now assigned to whatever the bpatcher’s outlet is
connected to
It synchronizes with the pattrstorage system

I’m sure you will find bugs (do tell) but it saves a lot of time
hacking patches when you decide you want to control your output
volume with your joystick instead of controller #7.
I build everything with it, any parameter I think I might control
with an external device now or later, I add this to the chain.

Here is the link
http://tinpark.com/maxassign

Cheers
Martin~
http://www.tinpark.com