Here is the solution I used which worked with 6.03b and which is apparently was wiped from the forums in the switchover to Contribs org. Of course if someone can tell how to update the Mac for use with encryption I am happy to learn
Author: Rich Lafferty (richl-forums_AT_e-smith.com)
Date: 02-17-03 00:24
You should be able to re-enable plaintext auth with a custom template
for /etc/atalk/config -- if you look at that file, you'll see the UAM list.
That part of /etc/atalk/config is templated in
/etc/e-smith/templates/etc/atalk/config/20AfpdUAMLIST, so something
like this (untested) ought to work:
mkdir -p /etc/e-smith/templates-custom/etc/atalk/config
cd /etc/e-smith/templates-custom/etc/atalk/config
cp /etc/e-smith/templates/etc/atalk/config/20AfpdUAMLIST .
## note the space followed by a period at the end of the previous line! ##
perl -i -pe 's/so"/so,uams_clrtxt.so"/' 20AfpdUAMLIST
/sbin/e-smith/expand-template /etc/atalk/config
(check the file /etc/atalk/config by hand here to see that it looks right)
/etc/init.d/atalk restart
Since atalk startup is backgrounded (because zip_getnetinfo takes a long
time on a network without appletalk routers), watch /var/log/messages
for errors, and for the message
Feb 17 00:22:37 hostname afpd[24141]: uam: "Cleartxt Passwrd" available
indicating success.
Keep in mind that this means that users' passwords will be traversing
the network in the clear, readable by anyone watching traffic on the
network -- which happens to be one of the reasons we removed support
for cleartext passwords in 5.6.

Cheers,
--Rich