this isnt rli the post,
but from what ur saying it sounds like u have sky uk piped around your building (via rf output) and want to do the same with ur sky italia.
if the box ur using does have an rf output as well you need to remove the arial input from ur uk box, put it into the italia box then frm that to the uk box!
not knowing what box ur using i cant really help!
but if ur box only has scart outputs then you have a few options.
1. you can either buy a modulator in places like maplins , which takes the video and audio and turns it to rf! this can then be added to the uk sly box.
2. buy a video sender from somewhere again like maplins this will send it to anywhere you want to put the receiver unit and plugs str8 into the scart on the back of whatever ur using!
3. (best and cheapest option)
use an old vcr and connect the scart of the sat box to the scart of the vcr, then connect the vcr inline with the arial input to the uk slybox, select aux input on the vcr and then hopefully (if u have connected the rf cables in right) this 2 will be piped around the building and all ull need to do is retune tv's to the vcr freq.
ian