Temporary keybind setup?

I'm trying to customize my UI for one of those scenarios where you fight as another character, and all it's abilities are on the pet bar.
I'm not getting anywhere by clicking the actions and navigating with the mouse, I need keys.

I tried HUD layout #4, but the keybinds are not stored in the HUD config and appear to be global. I really won't want to mess up my regular bindings just for this stupid battle. (Which needs a skip option)

Is there any way to save and restore a keybinding configuration?