The only way you can watch 2 different programs, is either you watch on terrestrial channel (i.e rte 1,tv3 etc) fed off of an external aerial, and one channel from your service provider (sky, ntl etc), or else you get a multiroom subscription from one of the providers (again, sky, ntl etc).
Solutions like tv senders etc, only transmit what your set top box or dvd player etc is sending out, i.e the same channel you are watching.
Wexfordman
Another thing you could look at is freeview using spare sky boxes etc, but channels are limited.