I've put together a very quick install video for the Golf R - it claims to be '30 seconds' but ended up taking almost 2 minutes.
http://www.youtube.com/watch?v=F2DYSUnsBN4
Note that the step you don't see on the video was that the first time the relay box is moved there is another unrelated controller between relay box and the gateway with the red plug. I had already moved that out of the way on my first install attempt - it is just tucked in behind the gateway box to make the swap-over easier.
Although the FIS+ box is just left tucked in behind the cubby hole I haven't noticed any rattles as yet, though I do plan to put some velcro on the back of it to secure it a bit more.