I had V+ fitted a couple of weeks ago, it is very good with a massive memory.
I wanted to watch the V+ box from bedroom and control the recorded programs menu. This is how its done:-
The only output from the v+ box you can use is SD( RF OUT)
Connect a coax cable from the main tv rf input( 3 way joint) to the 2nd tv.
I've used a one for all remote control sender( 1 in the living room 1 in te bedroom) this allows me to control ALL V+ fuctions)
The only downside with this is you cant have the hd output, only 1 output at a time. i've sacrifed hd for contoling from bedroom.
I,ve had no problems so far and its excellent watching recorded programs at bedtime,
hope this helps