it will allow me to type up setlists, lyrics, lists of what's on each track of each recording etc
i am not keen on the idea of having to save things to floppies, fire up the "real" computer and then reopen it in OO.o just to resave in a more modern format
a text editor for that.
perhaps you mean a separate handheld text device or something?
even if you're renting you've got more rights than if you're using windows.
.sea files are "self extracting archives" and probably need opened on a Mac, or maybe StuffIt Expander for Windows can deal with it (do they make products for Linux?)
If they ended up as .bin files, I probably used OS X's disk utility to write them to floppy disk.
The easiest thing to do, obviously, is find a SCSI CD-ROM and use an install CD when possible . . .
For editing text, I don't really see what's not modern about rich text files; I use them all the time for taking notes and what not (firing up TextEdit is easier than Word -- and needs less screen real estate).
System 7 will probably mean saying bye-bye to your 5-second start up times as well.
Just contributing what I know from experience: You're probably going to want to format the floppies HFS (hfsutils should help with that).
(B) MacBinary files are stored with a .bin extension (invisible to MacOS 9 and earlier by default). Opening those files on an alien system will likely just yield raw data, the contents of which will be useless on your current system. You appear to have multiple parts to a single self-extracting archive - that requires no additional software, but will only unpack on a Mac system. You can find a UNIX port of StuffIt directly from Allume, but I've no idea whether that will work with Self-Extracting Archives or not. If not, they have an SDK on that same page, and a quick journey through the APT repos should turn up something (though I doubt it'll say "StuffIt-compatible replacement" right there in the description).
(C) Take anything I may say with a grain of salt. I've upgraded 6.5 to 7, 7 to 7.1, and 7.5.3 to 8.5 (each on separate systems) but I've yet to undertake what you're doing here.