You know what I love about the Internets? You can find a fix for daggone near anything that ails you.
For example, from the developer's website:
World of VS Default Browser Switcher
Currently it is a bit of a pain (as in “too many clicks” and sometimes non-visible options) to change the browser used by VS when you’re developing and testing your website.
http://visualstudiogallery.msdn.microsoft.com/bb424812-f742-41ef-974a-cdac607df921/
