Rebind Mouse buttons?

[sbvera13]

I use the mouse to free look by right clicking, which is the default setup. Unfortunately, it has a tendency to try to loot/inspect anything on the screen while doing this, unless I hold the button down for a pronounced length of time.

The simplest solution I can see is to rebind loot to the middle button, but there's no way to change the bindings at all in the options screen. Is there a way to manually do this, or another workaround to the above problem anyone knows about?