One idea:
The video capture software on the PC should have a way to input a signal from any video source, so you could then use a video camera directly to capture printed stills of the subject photos. Zoom/pan/fade/focus effects could be added on the fly and made to look very nice if there is a tripod on hand.
Idea II:
A free program is available from Microsoft.com called Windows Movie Maker has image incorporation, audio track addition and titling features. More info
here.
Good Luck!