Hmm, where to start.... There are quite a few configurations you could use depending upon what inputs and outputs you have available on your existing equipment and what you want to achieve in full.
I assume that the distribution amplifier in the attic is at present just taking the signal from the aerial and feeding it to each room, one of which happens to be the living room, correct?
If that's the case and you just want to feed the satellite signal to the other rooms (not the DVD and VCR outputs as well), then you need to reposition the distribution amp on the RF output side of the satellite box.
So, the TV aerial feed would be connected directly down to the input on the satellite receiver in the living room. You would then need to run another coax to take the RF output from the satellite receiver back up to the input of the distribution amp in the attic. That way you would have the satellite signal distributed to the rest of the house. (*)
You still need to feed the signals to your living room TV, so there are a number of choices:
1. If you're lucky, you might have one of the Sky boxes which has a second RF output on the back. If so, just loop that one on to your VCR, TV etc. as before.
2. Insert a Y-splitter at the RF output of the Sky box, one output to go back up to the distibution amp, the other to your local DVD/VCR/TV. That's normally acceptable so long as the off-air signals are fairly strong to begin, but keep in mind that a splitter introduces signal losses, so if signals are already weak it can cause problems.
3. Run a third coax drop from the attic and connect the living room DVD/VCR/TV to the spare output on the distribution amp (you should have at least one spare, as you freed it earlier by changing the aerial feed).
(*) Obviously you would need to tune the other TVs to the satellite signal. If you are already using only the A/V (SCART) output from the satellite box, the RF output might even be turned off.
On a Sky Digibox, you can check that the RF is enabled and set what channel it is on by using the "secret" installer menu. Go to Services, 4, then press 0, 1, Enter.
