Has anybody else made headways in FTP under MacTCP, email clients that work (with what provider?) and so forth?

I tried installing AppleShare 3.7.4 to 7.0.1, but it doesn't work. OpenTransport 1.3 apparently does install, but without AppleShare 3.7.4 it won't work.

In order to connect to a 10.5 or higher machine you must use FTP. AppleShare simply won't work unless you have OS 7.6 or higher.