The macosxhints Rating:
[Score: 9 out of 10]
... in order to configure something that is integral to the Mac OS you have to use *a web browser* that is built by Microsoft - If that doesn't seem wrong to you then you've already given your soul to Bill Gates.Given the recent announcement of the end of new IE versions on the Mac, I expect that we'll soon (Panther?) see an Apple replacement for setting protocol helpers in OS X ... but until that time, Vince does the job perfectly. Once launched, you get a small pop-up menu listing all of the available protocols, along with a short description, an example URL, and the currently assigned helper application. To reassign a helper, just select the protocol from the pop-up menu, click the Change Helper button, and then find the new helper application. Very simple, very easy to understand, and free of the reliance on a web browser as the configuration tool.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20030717073219332