Skybox F5S Setup

Hi,
I am looking for information on the setup of a Skybox F5S. I am new to all of this so would appreciate as much help as I can get, and if people can go easy on me. I am looking at buying a Skybox F5S box as my first satellite reciever and have a few questions and concerns I'd like to clear up before I take the plunge.

If I was to buy a Skybox F5s, connect up via an ethernet cable to my router, connect up a signal cable to a spare LNB on my satelitte dish, and download and install a channels list along with the recent firmware to my laptop, then onto USB stick and install onto the F5S reciever and away I go? Or is that very naive of me?

Or am I best purchasing a box with a "12 month gift"?

My only other concern is that, currently downstairs we are running a Sky+HD box, and the F5S box is planned to go in a bedroom. I have read that this can lead to scambled signals on one of the boxes when both are running at the same time. Is this always the case? Or is it hit and miss? And is there a way around this?

Any help would be great,

Cheers,

Matt