That nasty start menu etc. that hogs all your resources can be altered. In c:\windows\system.ini add the line shell=progman.exe this should stop the desktop loading and load the old Win3.1 "desktop". There are usefull alternatives, have a look on www.litestep.net. After that I quite like leaving messges for the Admin at our shcool in the Autoexec.bat file. Nothing mean of course:
@echo off
:1
echo GET UNIX YOU FOOLS
GOTO 1

Bye