Using Hazel while with Parental Controls

Hi
I am trying to setup some computers for a school video editing lab. We want to use Hazel to clean up our desktops at the end of each school week, but we are having a conflict with the parental controls.
The computers are running OS X Leopard, I have created a separate login for the students to use. In this login I have blocked their access to the system preferences. This is necessary as we don't want students changing any of the computer settings. Unfortunately this prevents Hazel from running as its controls appear on the System Preferences screen.
Is there some way to work around this problem either within parental controls or through Hazel itself? To reiterate the problem is that Hazel is blocked from cleaning the desktop when access to the System Preferences is blocked.
If we can't find a way we will have to manually lean the desktops every week. Needless to say we would like to avoid this so if anyone has had a similar problem any advice on how they handled it would be greatly appreciated.
Thanks in advance
Nikhil
I am trying to setup some computers for a school video editing lab. We want to use Hazel to clean up our desktops at the end of each school week, but we are having a conflict with the parental controls.
The computers are running OS X Leopard, I have created a separate login for the students to use. In this login I have blocked their access to the system preferences. This is necessary as we don't want students changing any of the computer settings. Unfortunately this prevents Hazel from running as its controls appear on the System Preferences screen.
Is there some way to work around this problem either within parental controls or through Hazel itself? To reiterate the problem is that Hazel is blocked from cleaning the desktop when access to the System Preferences is blocked.
If we can't find a way we will have to manually lean the desktops every week. Needless to say we would like to avoid this so if anyone has had a similar problem any advice on how they handled it would be greatly appreciated.
Thanks in advance
Nikhil