I spent a while today going through the configuration steps listed in GreenHopper 101, sections 2 and 3 ("Configuring JIRA and GreenHopper" and "Optional Extra Configuration").

The steps in Section 2 seem to be universal (otherwise why would Section 3 be called "Optional Extra Configuration")?
So, it seems to me that there should be a button that performs those steps.

There could also be an administrator form for specifying which of the optional configurations are desired, and a button to go ahead and do those.