to break group, its easier to make a macro for each toon and bind it to like the opposite of your invite macro. the script command for disband is

/script LeaveParty()

thats the one i've always used. i haven't used the one inside jamba (didn't know there was one actually)
jamba actually has so so many features i didn't even know existed until i started looking through it earlier, because of this thread actually.

I would like to give a huge thanks to Jafula for making the add-on and keeping it update for us. I couldn't imagine doing things the way i used to before i learned about jamba. Everyone should try to donate a little something to jafula for his work. i have and probably will again soon.

KEEP UP THE ROCKIN" WORK!!!!!