[idvusers] can plugins be installed for all users?

I'd like to install a datasource plugin for all users.  Is there a method by 
which all users would automatically have this plugin enabled when they run IDV 
instead of each user installing it by hand?  I tried specifying a SITEPATH and 
creating a SITEPATH/idv.rbi file with:

  <!-- Where to look for plugins -->
  <resources name="idv.resource.plugins"  loadmore="true">
        <resource location="%SITEPATH%/plugins"/>

But the user still needs to "install" the plugin.  Thanks for any help.

Dallas Masters, PhD
MOPITT Data Manager
National Center for Atmospheric Research
PO BOX 3000
Boulder, CO 80307-3000