Pleasure Jack, sorry it involves so many steps - you can also try Play on Linux as a tool to get going on Ubuntu or similar.
Another ray of sunshine - Torchlight will run under Wine with minor tweaks and there are a number of people talking to the Devs trying to get a proper Linux client released. Unfortunately at the moment the original installer will not function properly due to the DRM stuff embedded in it so you'd have to buy a copy and then download another version
