Sorry williamlaw, only just seen your message. Get some sleep and ignore this for now, but are you saying I should make sure a Sky channel is on when I am going through your suggested process (presumably so that I will know if it suddenly starts working)?
It is already on mgcamd_1.8r1 as default. But yes, when I followed your instructions in Dream-Explorer, mgcamd appeared empty whereas CCcam was 238kb'.
If I set it to CCcam and press restart, and then doesn't work, can I easily revert my settings back to what they were under mgcamd? I'm just a little cautious because if I mess this up.