1.5.4 is fully unlocked. You need not do anything else. It''s of course pre-OMS and definitely runs on a real modem or printer port. I used it on a Centris 650, then on a 7100, 8100 and 9100 very smoothly, even running side by side with Unison 1.5. Possibly it will work with a G4 stealth port, not so sure about Keyspan emulators. It does run on 9.2.2.
The other version 2 files were on .img files so I stuffed them with Stuff Lite. You need a floppy Auth for those however. I didn't see any hidden Auth files. I never used these version 2 files.
Regarding the 3.1 versions. Beta 1 is graphically unpredictable and generally undesirable. Beta 2 is what you want if you don't mind losing all the work you do. Lots of surprises. Good luck in your research.
UPDATE : Added Auth Patch for 2.1.3 only
