The following works also in other applications (not only in Skype) that use a web-cam and don't work with your video-camera connected to your PC through FireWire (for example).
By default Silverstripe CMS doesn't have any means to place a custom javascript snippet at the very end of the head section just before "</head>" closing tag. I faced with this today because I wanted to put Google Analytics tracker code there. Of course, I know that technically one can place this code anywhere, but I had problems with my statistics and I wanted to be sure that I did everything as Google said.
The site has been migrated to a new engine. Now it's Silverstripe CMF with the standard skin BlackCandy.