Um, while what I do doesn't do it all in 1 button, it's not exactly a ton of work. With isxboxer you can setup profiles, which can launch profiles on other machines as well, then with a script you can launch whatever setup on each computer you want, using relay.
I don't think you can relay to another computer's IS instances, but you can have it just run it's own script .
relay command is something along the lines of, though I'm out of town for a couple more weeks still don't have IS on to confirm.
Code:
relay is1 ogre firsttoon
relay is2 ogre secondtoon
etc etc
And
Code:
relay computer2name run scriptname
to have your second computer launch it's login script.
When I'm doing some of my more intense raiding with 3-4PC's and controlling 12-18 toons, I use this and as long as I have done the prepwork making the scripts I can log them all in with basically 2 things. First, Right click Innerspace and choose my ISboxer profile. Second, run script for the toon setup I want to log on.
Kannkor, I don't bellieve you use ISboxer, but you really should give it a try, I think you will find some of it's features such as key and mouseclone, very useful, much less the time savings of setting up the profiles to launch as many EQ2's over as many computers as you want.