
How is the cabling arranged in your house? By this I mean you should have a cable coming into the house from outside which goes direct into the pace box. You should then take the rf out cable and run it up to the splitter/distributor box that you have - that will share the ntl box signal out to all TVs... all TVs showing the same channel that is being watched on the main TV of course.
It must be cabled in a similar way to this as you cannot put anything between the cable that comes into the house and the STB (like a splitter) as this is against NTL's T&C and can decrease your service performance.
At home, I have the cable coming in from outside direct into my samsung box (as it should be) and then the SCART goes to the main TV (where the box is situated) and the RF-Out goes upstairs to the kids room. We have a TV in our room, but its not worth the hassle of getting a wire there to watch NTL as we hope to be moving soon... but I will do when we move