IJ> I have just spent the better part of my morning looking for the logon
 IJ> screen ... the one that's presented to users as they are logging in... I
 IJ> have one... I see it... but for the life of me I cannot find it...

If you mean the Mystic logo, then its preuser.* file(s) in the default theme's text directory:

\themes\default\text

This is set by the very first prompt in the prompt editor for the default theme.  You'll see in prompt #1 it has:

"|DFpreuser|Enter your user name:"

This tells Mystic to display "preuser" from the theme's text directory.

... If at first you don't succeed, blame your parents!

--- Mystic BBS v1.12 A48 (Windows/64)