<<Does EnablePlainTextPassword turn off encryption for passwords
entirely, or just allow it for SAMBA and the like?>>


No, yes. Specifically, it allows NT to send plain-text passwords to a server
that requests them. See

  http://support.microsoft.com/support/kb/articles/q166/7/30.asp
<http://support.microsoft.com/support/kb/articles/q166/7/30.asp>

for more info.

However, the answers to your questions when the OS is Win98 are "Yes, yes";
i.e. if you turn on plain text passwords in Win98, *all* passwords sent from
the box are unencrypted. Seems dumb, but

  http://support.microsoft.com/support/kb/articles/q187/2/28.asp
<http://support.microsoft.com/support/kb/articles/q187/2/28.asp>

is pretty clear that that is the case.

Steve