Rasputin is a nice piece of software in search of a problem: it sends data at regular intervals to your ISP so that your ISP doesn't disconnect you after you've been inactive for a certain amount of time.
Back in the days of dialup modems, this used to be a problem, but in the days of broadband access, the need for Rasputin has largely diminished.
So unless you're a dialup user, or your broadband ISP disconnects you after a certain interval of non-use, you'll need Rasputin only if you're having connection problems. It may help to maintain a 3G connection, too.
If that's the case, however, you'll find Rasputin a breeze to run. Install it, tell the program your kind of internet access, and tell it the interval at which you want to send a signal, and it quietly goes about doing its work. Too bad that so few people will need it.