The .ZIP file could mean that it was created on a PC, or, equally as likely, made from OS X's Finder with the "Create Archive of '...'" option.
There is no such thing as an OS X font or a Classic font. There are TrueType fonts (the .dfont format used in OS X is basically TrueType), OpenType fonts, PostScript Type 1 fonts, PostScript Type 2 fonts and others. Neither are specific to a PC or a Mac, or to OS X or to Classic. TrueType fonts are more common on the PC side, but Macs running OS X can most definitely use them as well (I do).
Right now, I have a combination of .dfonts, TrueType fonts, PostScript fonts and OpenType fonts on my OS X machine, and they all activate and appear just fine. However, OS 9's default font format is PostScript, so adding a TrueType font or an OpenType font to System Folder:Fonts (there is no system/fonts folder in Classic or OS 9) won't do anything.
There are also font conversion tools out there that work with some degree of success -- I've had a good many fonts convert from TrueType to PostScript perfectly, but others seem to give me a problem -- probably because it's also possible to put a sort of "protection" on fonts to prevent them from being embedded in documents, a function that is required in order to be able to convert them.
Might wanna look through these and see if any can help you:
http://www.versiontracker.com/php/s...search&str=font+convert&plt[]=macosx&x=13&y=8
If you want to use that font in Classic or OS 9, you'll either want to convert it to a PostScript font, or use Adobe Type Manager Deluxe for Classic/OS 9, and information on it can be found here:
http://www.adobe.com/products/atm/main.html