Changing the default browser for opening hyperlinks in Outlook

[Mr. Walnuts]

Does anyone know where (in the tools/help/settings sections) in Outlook 2010 I can change the default browser for opening hyperlinks in Outlook 2010?

While I DO have IE9 on my PC, my default browser is Firefox Aurora... however, all my links still pop up in IE; anyone know where/how to change this?

Any help is greatly appreciated

Chris