A tutorial for a Minimalistic Development Shard is now available in the GoW wiki. It is mainly aimed at age developers that want to test their ages in MOULa, as well as developers of the server and client software itself. It creates a Shard with no dataserver protection so that the client can be modified as will - the server still needs all age and SDL files though, due to the way Uru works.
Currently the result is exactly like MOULa, plus some Python fixes. Specifically, it does not contain a command to actually link to an age you added, but if an age developer says he's at a stage where he needs that I can easily write such a command
Please tell me if you got trouble with the tutorial. I am still working on patches to make some steps easier, but the current versions of client and server should work with the current instructions.