I'm getting closer, I think - have found something which claims to do exactly what I want, but don't understand what on earth it means about running CAB files - when I try to save to my pc it comes up as a ZIP file no matter what I do.
Surely an expert out there knows what to do!?
The website I've found is
http://artax.karlin.mff.cuni.cz/~jsy...ler/index.html