Once you have MCE2005 and all the appropriate drivers for your hardware installed, launch the Media Center application. It will instantly kick into configuration mode and I must say its wizard is the most impressive that I've encountered thus far. Once you've launched the wizard and you've danced past the EULA and privacy agreements it will confirm that you have an internet connection that is always available. It will even test connectivity for you. Once that's out of the way, it will have you configure your tuner(s) and television signal. It will ask you for a region, which defaults to the United States. After I flipped it to Canada and continued on it asked me if I wanted to let it automatically detect the type of television signal that I have, or if I'd like to select it manually.
I hit automatic and after a couple of seconds of looking for a set-top box it discovered that I just had standard cable connected to my capture card. That was that. The next request will be for your zip or postal code. Once you've set that, MCE2005 will go out and find a list of providers from your area. The only remaining things to configure after that are your display and speaker setup. It's relatively quick and painless.