I have an intergrated digitalTV, so I should be able to pick up free to air digital channels (BBC Choice etc.), but I live in a group of 8 flats with a communal aerial. I cannot tune any Digital stations in because the signal is too weak. How can I overcome this? Would a signal booster do enough or am I going to have to have my own aerial installed? Would connecting it to an existing satellite dish work? (if I do have my own aerial installed it'll have to be internal because we're not allowed to put aerials/dishes/etc on the building.)