Making forums a fixed width, and side navigation..

[FightRice.com]

How can i set my forums to be a set width and add a navigation module to the side?

The navigation module is located here, http://www.vbadvanced.com/forum/showthread.php?t=7494

And here is a good example of what i want it to look like,
http://forums.deviatedhq.com/forums.php

Thanks