To move things up and down the list in ISBoxer, ALT+UpArrow, ALT+DownArrow. It shows it in the right click on other items, but the Characters don't, but they respond to the Hotkeys.

There is nothing in your config that should cause the hanging.
Do you have other addons? or interfaces that might be interfering, like especially one which is setup to bind to CTRL+ALT+SHIFT+NUM2. Try disabling them.

Also, what is chewing up all the CPU? The game clients? As ISBoxer/InnerSpace only sends single sets of keystrokes to the game, and only when you press a Key then it is unlikely the issue is anything within it, but rather how the game is responding to the input, and that puts it squarely back in the court of, Is your macro doing it or do you have some other addon/ui that is not playing nice.