Yes the script requires Elevated Permissions to modify anything in a system folder on Vista.

It can be done via GPO.

Search Microsoft for Elevated Permissions on Vista

What you might be able to do is copy it to a users local folder and from there copy to the system folder (but probably not unless the user has rights to do so as well)

Even going through the GUI you can not directly copy files from a Server location into the local system folders - you first have to copy to another location such as a user folder, then to the system folder.