Patches and upgrades expect to find a file with a specific name. Once you start changing a vendor MSI, it will no longer work with patches and updates from the vendor. Not only that, but you run the risk that any code signing of the installation is going to be damaged as well.
So what you need to do is to change the way you are blocking Google Earth in your estate.
I don't know the Landesk product, but I would be very surprised if you cannot arrange for blocking to be applied on a more granular basis, eg by group membership.