Even though you're supposed to need Mac System 8 to install Netscape 4.8 (and since I can't seem to get a clean copy of the 7.6.1-friendly version from system7today.com), I found another source for the elusive NS via www.pure-mac.com (go to www.pure-mac.com/webb.html for the site's browser selection).
It led me to Netscape's FTP site, and this file: ftp://ftp.netscape.com/pub/communicator/english/4.8/mac/complete_install/Comm4.8_Complete_US.bin
My first attempt to dowload a clean, unstuffable copy in Netscape 4.7 failed, and IE 5 wouldn't let me do it at all. I gave 4.7 another try, and I got a good download. After unstuffing, the install program said I needed System 8-point-something to do the install. So I went into the Netscape Installer folder and clicked on the Netscape Installer icon ... and the damn thing ... installed. Brought all my preferences from 4.7 along with it.
Everything looks just as it did in 4.7, but it seems a tad faster (could be the long day). I'll have to keep testing.
In other news, I installed Outlook Express 4.5 ... didn't work with DSL Extreme or Gmail. I haven't bothered to try Gmail with Netscape, but I just might do that. It's amazing that of all the programs out there that run on System 7.6.1, Netscape is the ONLY one that works for e-mail. I did get Usenet news through Outlook 4.5, but it didn't organize it as well as Netscape, and if OE can't do e-mail with today's servers, it's good for nothing. I suppose there are POP mail services out there that will work with these older programs, and I'm not saying I won't investigate, but if DSL Extreme won't run on it, I'm in serious doubt that much else will, either. (Even Yahoo lists Netscape 4 as being compatible with its POP service .. not so for OE 4.5 or 5).