Scripting

Hi!

I'm working on installing ArcGIS9 here on some machines by using GPO.
Now installing is nog a problem at all!
Through the information here I found the silent installation document from ESRI itself and it's a blast..

But eventhough the silent install is not a problem anymore, the silent UNinstall doe not work :(
If I uninstall the package in a not-silent way it works flawlessly, but if I uninstall through GPO or through the commandline with the /qb option it ends up in an error and just won't uninstall..

It says:
Error 1721. There is a problem with this package. A program required for this install to complete could not be run.

I'm gonna have hell through uninstalling version 8.x before installing version 9.x and I don't want to run into this 'hell' again when 9.x should be uninstalled so I want it to work before throwing it onto the clients....

Can anyone help me out with this? in some kind of way