You cannot add a program to change hotkeys for spells ?
Soundwaves has a post about it here
xXHarDCorEXx posted how to do that on our older forum the program is called Keycraft you can download it from one of these sites I think
Keycraft 2.01 this sites not English but the file is English
Keycraft 1.10 this ones an older version
I don't know if either of those are the latest version of that program but it can do what ur wanting I'm pretty sure.
you can also manually change your hotkeys by editing the customkeys.txt file in your mpq root smile.gif, although i think this might change ones based on a buttons location, and for games that custom keys were already defined, and for custom spells maybe