To create the icons, create a shortcut on the desktop.
For Shutdown, the command is
C:\WINDOWS\RUNDLL.EXE user.exe,exitwindows
For Restart, the command is C:\WINDOWS\RUNDLL.EXE user.exe,exitwindowsexec
For Logoff, the command is C:\WINDOWS\RUNDLL.EXE shell32.dll,SHExitWindowsEx 0