Picnic box hole

How to set browser used by Yahoo Messenger? - how to set default web cam

I have Windows XP Professional with Service Pack 2. I love using Mozilla Firefox instead of Internet Explorer. YM and when I click on a link that launches IE instead of Firefox, even if I set my default browser Firefox. Even web-cam straight to the Internet Explorer.

Is it possible to configure Firefox to when you see a link or a web-cam, you are using Internet Explorer instead of YM to start?

Thank you very much ...