Using MongoHQ and central_logger on Heroku with rails app


I am trying to setup central_logger
( to my heroku app. Can someone
please point me to a tutorial or lay out steps on how I can achieve this?
The readme is quite clear but doesn't say anything about heroku integration
except for point 4 which says

For use with Heroku you need to prevent the rails_log_stdout plugin from
being added by Heroku:

mkdir vendor/plugins/rails_log_stdout
touch vendor/plugins/rails_log_stdout/.gitkeep

I dont quite understand this without some more context. It will be much

APologies if the question is ambiguous.

Thanks! Satyam