Greetings Grimbo!
Here's a good place to start: Your FAQ Guide Updated
Once you decide which software you're going to use (most people here use keyclone because it is awesome!) you can be on your way.
Assuming you are going to use keyclone your next step should be to go here after downloading/buying keyclone: http://www.digitek.se/dualboxing/Beg...ual-Boxing.pdf
This guide as well as what most of the people here use and it pretty easy to set up if you follow the instructions in the guide.

Good luck!