I finally moved to Xcode 4, and wrote a tutorial about how to set it
up for Cocotron.
Have a look if that interests you:
http://lacquer.fi/pauli/blog/2012/02/win-win-with-cocotron-part-1/
I'm also hoping that this will serve as a generic Cocotron tutorial,
hence the fairly long exposition about the project's components, etc.
Pauli Ojala