That's not what he asked at all and having to install a program to update is, imo, a lot worse than SecuROM which is pretty much unnoticeable unless you start digging in the registry.
OP, you might be able to copy the files over. There may be an activation issue, though, I'm not sure quite how that works - if you run into that sort of issue, you could probably pop in one of those free hours dial-up CDs, then start impulse, and reactivate it over the web without having to download the game again.