In short:
- if you have a class category: 'Foo' with a class 'Bar' in it - open the monticello browser from world menu - click on "+Package" to add a new package - name it 'Foo' - select the new package in the list of packages (if you click on browse you will see what's in your package, you should see your class Bar) - click on "+Repository", select HTTP, enter your squeaksource projects data - hit "Save" on the selected repository, make a comment on the version and upload
You should read the short intro to the tools
http://www.bergel.eu/download/squeaktools.pdf
Bye Torsten