HOW TO DISABLE specific .JAR files via WGM?

HELLO,

I work at a 1:1 school with about 500 students all equipped with Macbooks unibodies. They are all managed through Lion Server and WGM.

Students are allowed to use their flash drives to transport content for their assignments.

Students have put Minecraft on their Macs from a flash drive that is in a format of .JAR file.

I have WGM set up to block any application that is not the Application folder. The .JAR file named MinecraftSP.jar will excute from the desktop letting students play minecraft during class.

Is their a way to block that file or .jar files?

Thanks