Welcome to the site Jmedia. Yeah the MPGuino is great. It's light years better than a vacuum gauge, although having both is even better. All you need to do to hook it up is find a +12V source thats hot all the time, a ground, the vehicle speed sensor wire to the computer and one of the fuel injector wires from the computer to the injector. The MPGuino wiki
MPGuino - EcoModder has a lot of info on setting it up. Again, welcome, and good luck.