Noob boxer looking for a little help.

Ok first I will start off listing my setup.

2 Computers
2 Monitors
N52
G15 and a cheap keyboard for 2nd computer
2 Wired Mice

Ok now onto the questions.

I play a game called NexusTK. I guess it qualifies as a 2d MUD. www.nexustk.com or www.nexusatlas.com for anyone interested in checking it out. I am trying to box 2 characters at once on this game. There is no follow command, and I don't want to control both with the same keystrokes because they are 2 totally different characters and playstyles. I am playing a healing type character and a dps character. The good thing about this game is there isn't a need for alot of movement, so follow isn't necessary. What I am wondering is how (if possible) to have my G15 standard keys control 1 character while the macro keys control another.

If anymore details are needed, please inform me. Any help is appreciated. :)