don't know how to setup my VersaLink Router

I recently bought a new Macbook and would like to switch to wireless internet access. I currently have cable modem, and Time Warner has informed me that it will cost more each month to switch to wireless service plus a huge installation fee. They said that if I had a router, I could just hook that up to the cable modem and it would work.

Luckily, I happen to have a Westell Versalink 327W Router from several years ago that I used with a PC laptop. I can't figure out, however, how to set it up to work with my Mac. I even read through the manual they have online, but that left me more confused, as the menus and screens are different from what I''m seeing. This is way beyond my technical knowledge.

Any help would be greatly appreciated!