I updated the manual. Please check it out, report any grammatical errors.
When you are missing something important, that new users should know, let me know.
http://www.efmer.eu/boinc/boinc_tasks/manual.html (http://www.efmer.eu/boinc/boinc_tasks/manual.html)
A more detailed manual of the Dialogs can be found here:
http://www.efmer.eu/boinc/boinc_tasks/manual_detail.html (http://www.efmer.eu/boinc/boinc_tasks/manual_detail.html)