Until I came across your post, I have never even heard of those. But I did a quick research. Here are some basics on that format:
http://computersight.com/computers/t...iled-and-hard/
http://www.fact-index.com/h/hy/hypercard_1.html
HyperCard was withdrawn from sale in 2004, however, there are some HyperCard clones still available:
For OS X:
http://www.supercard.us/
For Win (free player WinPlus 3.0):
http://www.angelfire.com/ab2/literacy/win.html
Cross-platform:
http://www.metacard.com/
Maybe you should try one of these.