Disabling Monitor Poweroff, but still powers off?

# HAIL to the person who can HELP!
Sorry all the words, but I want to help you understand what I have covered
already.

Quick Problem Scetch overview:
20 PC's = All identical
Some Mon's remain on Scrn-Svr, but others power-off/standby.
Need to have all on Scrn-Svr permanently
Ctrl-PANEL, ScrnSAV-Properties & Reg fix don't help
What else? (How force Monitors to remain on.)
Oh yeh! I have disabled stanby in reg too...

NEXT - My DETAILED PROBLEM DESCRIPTION:

My Problem Scenario:
I have a computer room with 20 new computers. All identical (Xp Pro). Whiled
logged-out, about half goes to scrn savers and the other half powers-off
monitors. I don't want this. Need them all to stay on screen saver. Since
logged-out, cntrl panel power-options are irrelevant, right? After some
research, I changed the registry values to disable "monitor power off at

My half-way fix:
[HKEY_USERS\.DEFAULT\Control Panel\Desktop] "PowerOffActive"="0"

Remaining problem:
Half of those pc's worked like a charm and other half still
powers-off...looks like StandBy though, since the power lights on the Mon's
don't switch off (flickers).

Question:
Anything else I can do to disable monitor power-off besides throwing it off
a mountain (hehee)?

Jo