If you want a Serial to Composite Video convertor, such devices do exist and to find out more either:
do a search on this BBS looking for "Decade Engineering" or the "BOB II"
or visit This Link for details on their products.

With some software on the Empeg you could easily get a remote display of Track Info etc. You won't get the Video display e.g. visuals or Menu Overlays, but its a start.