you are wanting to go from analogue output to digital input, so would need an analogue to digital converter
- afaik these are not cheap
- looking at this
http://www.svideo.com/vga2dvi.html
tends to confirm that
- and that is just the video signal
- for the analogue to spdif sound there is e.g.
http://www.gefen.com/gefentv/gtvprod...p?prod_id=5278
- both just examples picked from a gereral search, so there are are probably better, cheaper options, but it does tend to suggest that it is more hassle than it is worth ???