I completely agree, I am all for minimal image and then the user should be able to install anything he/she wants through Catalog Browser, I think we need to make sure that the welcome text clearly illustrate this and that the new user is not confused.�� But that means that you the people who create project that are not in the main distribution make sure your project is on Catalog Browser and that there is a clear description of what it does.
Pharo already an excellent mechanism for installing packages. Just today I tried to install OSC library in Pharo 5 though monticello and configuration and I failed, then I tried the Catalog Browser and worked like a charm.
Big thanks to Esteban for this amazing tool is by far my favorite, second being GTSpotter of course ;)