It depends how the TV handset is supposed to control other devices. Modern equipment has something called CEC - commands are daisy-chained to connected equipment via a back-channel on the HDMI cable. Good luck trying to get that to work on the Foxsat, and even though it won't work on an HDR-FOX enabling it on the TV has been known to crash the STB. Even when all equipment is supposed to be CEC-compatible, you can expect incompatibilities between manufacturers.
On the other hand, the handset may have "universal" remote capabilities, like the Humax remotes do. In that case the selected device will need coding in to the handset, and it just sends out the IR commands suitable for the coded device. You will probably have more luck programming the Humax handset to run the TV.
