I wasn't sure where to put this.

Okay so I've seen a lot people posting stories about how they were ban etc and more often than not theyre using some kind of macro to give them a competitive edge. I understand entirely why this is not allowed. My question however was that I currently do not have the extra money for a new mouse. My mouse works fine all except for the scroll wheel. If I bump it it will occasionally zoom in and when i try to zoom out it either zooms out or just keeps zooming in or it zooms in and out. Is there a way to re map my scroll wheel function to the two extra side buttons on my mouse? or perhaps on my keyboard? If so.. will it get me banned? I'd hate to get banned over something really silly like this. Thanks in advance for your responses!