gavo, I looked in the Wiki and didn't see where you posted your message. However, I think it's pretty simple: for each Mac there should be a list of software applicable to it and the appropriate version numbers, probably at the very bottom, with a heading like "Compatible Software". Each software entry will link back to the main software entry for all versions of the particular software. You enter it in this format: [[Microsoft Word|Microsoft Word 1.0-1.1]]
Until someone adds the appropriate entry the software listings will be red, but at least the links will be established.