i just worte a big long post in media & arts forum a few days ago - check out the super 8 thread there. and for your question - you have to get a super 8 projector, project the movie on a wall or pull down screen and set up your minidv cam on a tripod and video the movie playingon the wall
'I should put my camera on a tripod - its easier to drink beer that way' - dirty steve
NS royal gangstar
Or you can send your film into a company and have them develop it and put it on minidv for you. Search the net, there are tons of places you can mail into. I worked it out a while ago and I think it's about $30 for 3 minutes at 15fps.