have not used this method myself, but worth a try.
Does your friends digicam have an output to enable him to display his photos on the TV? If so connect up and then try recording on his vcr while playing his show.
Otherwise he will need a TV out on his graphics card, and a slide show prog which will output on the TV out to his vcr. (Problem with this is that some cards with TV out will not show on monitor at same time. He will be recording blind.
Regards Brian j