Hi Magsd
i've recently had this asked recently , as a friend has just moved there cctv Dvr out of site,
this is now cotrolled via a wireless usb of which connects to there mouse.
i currently run the H2s via a s**b**x wifi dongle . As you know there are 2 usb ports ,i use the other for epg data, not sure if you could try one of the ports .
The device used was a logitech m185 . But the m187 is also very neat. Not too sure if the zgemma has the capability to do this
there are some fine guys on the site though to ask
regards
idledawn