Hmmm Samba also needs a TCP/IP stack!
Someone did distribute a keyfile for Miami through this board a while ago (dunno if it works?) and Genesis is free with OS3.9, There is a 1hr Miami demo free with OS3.5 and on the Aminet.
The Demo Version of Miami is acceptable though. (See Aminet).
I recommend using AmigaExplorer instead of Samba though... much easier to use.