Disabling Dock's context menu

Hi everyone, i'm from a small town in Argentina, and i have this question: 
can i disable the context menu of the Objectdock? 
i own a small cyber-cafe (6 PCs) and i have the Stardock Objectdock and WindowsBlinds in the system. Recently the "hackers" in this forsaken place has discovered that the docks in the desktop HAVE a contextual menu, so they are changing the position of my docks along with docklets and icons position. I have Deep Freeze installed, so there's no permanent problem, but the people who passes to the computers after the changes complains. I want to disable the context menu of Objectdock (WindowsBlinds is safe -at the moment-). I know how to disable the context menu of Explorer, through GPEDIT settings (a great tool by the way), and i've looked on the net reliable info about my problem with no success. I've heard and i know about the places in the registry where the commands (OPEN, PRINT, EDIT) are set, but what about the specific commands of the dock? I've searched and find nothing in my system. 
Objectdock has a config file, i opened it but there is no settings to disable the shortcut menu. 
This is my system: 
XP, SP2, not very up o date 
Thanks in advance...