[ubuntu] Possible to change behaviour of the "^" key?

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http://ubuntuforums.org – Hello, I'm coming from (or dual-booting) Win 7 and trying to get into Ubuntu since last night, so i'm completely newbie. Overall it seems quite neat, of course i need to build a basic understanding first but i think i'll figure that out over time via trial and error.. Though i ran into a more or less annoying issue while chatting. My first question (and yes, i know its a ridicoulus one) is, if it's possible to change the behaviour of the "^" key so that it appears twice if pressing it twice instead of having to press it four times. I'd be thankful for help and looking forward (Hardware)