I have put a movie of the first prototype on my website at
www.4tn.net/homecinema/ in AVI MPG and WMV formats. It shows an Owl 4:3 electric 7ft screen modified to multi-format. Cost of modification under 20 GBP.
I still need to find a better material. Used black felt for this one but I need to find something better.
I will post instructions once I have written them and ironed out a few problem areas.
I have started a thread in the DIY section where I will post details and pictures.