More Internet is a System Preferences pane that uses Internet Config to allow you to choose which applications are set as helpers for internet protocols (i.e. which application will be chosen to handle which URL.)
This is great because much like other parts of OS X, these things (Internet Config, for example) were easy to get to in OS 9 (Open the Internet Config application; Internet Control Panel, for example).
This is a good, free, System Preference to download.
