Thanks for the suggestions, however the solution came from
another angle.  It turns out that pcAnywhere can cause a
conflict between the video drivers that the computer uses
and the drivers that pcAnywhere uses.  See KB266786.  This
machine has pcAnywhere running on it and was installed
after the video card was installed.  Also I found a Number
Nine video card that is supported by NT 4.0 setup (so no
3rd party drivers) and installed it instead of Monster
card.  After renaming awvideo.dll to awvideo.org I
rebooted to VGA mode (got blue screen going into normal
startup) where I could make setting changes in Control
Panel - Display.  Then before rebooting again I renamed
the awvideo.org back to awvideo.dll and now all is fine.  

This is the second time that a Norton (Symantec) product
has caused major problems.  On another machine the
Symantec Redirector (symtdi.sys) was causing a machine to
stop responding when under load.  After disabling the the
symtdi device the machine doesn't freeze up anymore.

Hope this info may be of help to someone else.

Mike