Window8 requirement for all Application Bundles

We are beginning to add some Windows8 devices to our (Windows7) environment. All application bundles have been tested for Windows7 X64. To prevent applications being deployed to the new Windows8 devices I would like to add a requirement to all application bundles.

Is there a smart way to modify all bundles with the same requirement OS version=Windows7?

Can this be done with the zman commandline? Or through an export - XML modify - import action?

The last option is to do it through the ZENworks Control Center, but it will take a lot of time.....

Regards,

Wilco