@Dannii: Thanks for clearing that up. Renaming Level 9 files did work, but Magnetic Scrolls didn't. However I found this site
where Magnetic Scrolls games in .mag format are available for download.
3b: No, what I meant was an interpreter that can play Z-Code but also display the story summary. When I load Bronze in WinGit is shows me an intro screen, then gives an error because it can't play Z-Code. I wondered if there was a Z-Code interpreter that shows that intro screen.
@Peter: Ah, I thought it was like a ZIP or RAR archive, but apparently that's not the case at all. Thanks.