The Cocoon Two Idiots guide was contributed to the core Apache Cocoon project some time ago and is currently available as part of the documentation on that site. There is currently a whole load of work going on to consolidate the documentation and it is likely the the information will be aggregated with other content. I fully intend to continuie to support the documentation of Cocoon and so expect more info to appear here from time to time.
In the meantime, if you are looking for extra installation help or instructions on how to get going with Cocoon then please reference the more than adequate documentation on the site. Thanks for looking!
If you want to check out the original stuff then please click here for the original pages.