Web Security 7.7 install options for remote sites

We have several remote sites that each have their own internet connection and there is also a VPN connection that connects the main office to each of the sites.  The goal is to have a central management server for the main site and the remote sites have a light version of Websense that captures the surf data and filters and reports back to the main site on a schedule.  Is this setup possible?  What Websense components will I need to install at each remote site?  We do not use an applicance, I plan to install it on a Windows Server.

Thanks!