Access 2007 Runtime install with active directory

I am trying to install access 2007 runtime with group policy software 
installation (Active directory). When I try to add the accessRT.msi it 
shows:-

"Add operation failed. Unable to extract deployment information from the 
package. Run validation on the package to ensure that the package is 
correct"

I found some info on the technet stating you have to use the Config.xml. I

have tried creating this without any sucess and cannot find any 
do***entation releted to access 2007 runtime.

Has anyone managed to do this?

Thanks