Adding a third resource bar?

[Feliaria]

So, @LuLingqi1 gave me an idea for my game. One of the mechanics is that the character can switch between skill sets during combat. To add a layer of "risk-vs-reward" to the switching, LuLingqi suggested I add a resource that will control the ability of the character to use the skill set swap. Give the resource a certain cap (like 20), and make skills generate or consume it like MP and TP. Would it be possible? If it is, I would need it to be compatible with http://forums.rpgmakerweb.com/index.php?/topic/65531-yep-battle-status-window-extension/

 

[LuLingqi1]

Buuump. This is something I'd really like to know as well :c