My roommate often hooks his Macbook to his HDTV. The problem he has it sometimes is hard to read text. He can zoom is while holding the Ctrl key and then scrolling up with the scroll ball on the might mouse. What he'd like to do is be able to map the side button on the might mouse to the control key so he can just click that and then scroll up to zoom in (so there is no need to hold the physical key on the keyboard). Is this possible? I'm guessing it can maybe be done with an Applescript but I have no idea how. Any help would be much appreciated.