Cool - thanks for the quick responses guys.
I was thinking you could route thru the STB into the recorder, but was thinking like a video player where the video will only record what's on its tuner.
Guess i'm still a little confused how it can do it

Think i'll just put it down to witchcraft.
If you hear of someone putting a tv and associated tuners / recorders thru a window, you'll know i wasn't successful.
Thanks again for your help and stay tuned (sorry for that).