by executing " "c:\program files\common files\microsoft shared\web server
extensions\12\bin\psconfig.exe" -cmd adminvs -provision -port 12345
-windowsauthprovider onlyusentlm" on any server  in the farm, you are 2 minutes
from having Central Admin on any server farm member. So, I generally only have
it on one server in the farm.

This is not stsadm, and I haven't heard of this before, could you pl.
elaborate a little.

A link to any reference material would be ideal.

Psconfig.exe is the command line utility for the SharePoint Products and
Technologies Configuration Wizard. Like stsadm is the command line tool for
central administration, psconfig allows to run commands to configure your
SharePoint environment as would if you were using the Wizard. The wizard is
the preferred method for moving central  administration from one server  to
another, so, psconfig allows you to do this via command line instead. Also,
if you are interested Craig Carpenter has a security paper for Central
Administration, you can find at
http://www.combined-knowledge.com/Downloads%202007.htm called Securing
Central Administration. At the bottom of the paper he explains how you can
setup a second Central Admin.