Mark,
If you really want to play, you should also get a diseqc rotor. They are suprisingly easy to set up, no additional power wiring required and give you access to the whole sky, rather than just the limited choice available at 28.2 deg east. If you are going up the ladder anyway....why not!! Especially if you are going down the dreambox route, it would be a shame to waste its potential. You can get the motors suprisingly cheaply online, and with a slight premium in maplin.
Set up is a breeze really, you just point south until you pick up the signal for Thor 3 at 0.8w, and based on your long/lat the box should be able to calculate where all the other sats are.
Ricky