YEEEEEHAAAAAA!!!!
SUCCESS !!!!!
Yes, there does appear to be a slight lag with the audio, although, in my infinite wisdom (or should that be 'infinite stupidity' ??) I happened to pick a computer-rendered movie as my first test-subject (Hoodwinked) - So it's not really that easy to notice the lag.
Further experimentation needed.
I'll continue to post the results of my experimentation, but at least now my sweetheart has a full movie on her Mirage
Many thanks.
The RoadRunner..