Which means you can examine the source of your particular installation. It also can run over [link|http://www.uk.research.att.com/vnc/sshvnc.html|SSH]. You can download the installation program(s) for the platform(s) of your choice, verify they do what they claim (if you want) and keep that on your conference room box. You can install the server (that's the piece that sits on the box running the application/generating the UI) from this verified source.

Anyone coming in with their own box can plug it into your network, or direct NIC to NIC with the projecter box (depending on security concerns), install the server and go.

After the first time you've done it, it actually takes less time to do than it's just taken you to read this.