VGA Out > powered VGA Splitter > Gefen DVI Scaler Plus > Blackmagic Intensity Pro
The Gefen was only 99p and differs slightly from the one linked as I suspect it is a version they don't make now, it's beaten up looking but it works. The Intensity Pro does not encode video on the fly and requires a pretty hefty RAID setup to do this stuff, though the lack of compression does make for a quality boost and reduces load times in Vegas as the CPU doesn't have to decompress the video.
That Covox doesn't differ greatly from Mr.H's, I seem to think I just fixed one or two issues in the logic diagram I had, but now you mention it I have to fix mine as I jammed the wrong power brick in, it was the right voltage but the incorrect polarity, I might add a rectifier to it or even just a diode to ensure that can't happen again... I've got to finish repairing my DX-100 first though as I think the DAC in that is also dead and I know for a fact the tone generator is... If I get that working it will appear on the internet at some point as the repair work is very extensive due to the board being cracked in several places and it being unable to complete the test mode due to the firmware locking up... Which I suspect is down to corruption somewhere.
As for the VGA, I think I'll come back later and add a few stills of stuff taken directly from the card, I'd upload an AVI but the file size is ridiculous and I don't really fancy paying the bill for the bandwidth it would use; around £2 for every 1GB... Sucks when your city only has one ISP.