Thanks for your help with this. They are 360k disks. They are not, however, altogether mission-critical. I have coped without the disks since about 1993, and I dare say that I can live without them still. However, we all like to tinker, and this is a kind of tinkering that could almost qualify as useful....

What I didn't realize is that it would be quite so complicated. It's not exactly a question of plug and play on any Mac, is it?