Evented mongrel question - maybe for Kirk

hi i am setting up evented mongrels on one of my servers and
i am running into a little confusion.

i understand that there is a few diff ways to set this up. one being
using the swiftiply gem, setting the env variable to event=1
( this is one level of confusion on ubuntu ) ( how to do this )
then also setting the require in environment.rb in rails

and the other i believe is to overwrite the mongrel_rails file
with the one in the package ? is this correct ?

please someone shed some light