I blogged about Cairngen a few hours back and I have that up and running now. Following are instruction to get that running:

1. Down the project from Google project
2. You need to some additional JARs as well:
   1. Mozilla Rhino (JavaScript libraries)
   2. Jacarta BSF
   3. One of the blogs also called out that you may need commons-logging-1.1.1.jar (through I already had that in my classpath
3. To provide the details, of the code generation, you would need to modify the project.properties files.
4. Now you can run the ant build -> ant main, which will provide you with the basic setup of the folders
5. When you are ready to generate files, you can use one of the following targets:
   1. create-multiple-sequence-exclude-delegate: Generates the commands with-out the business delegate layer
   2. create-multiple-sequence-include-delegate: Generates the business delegate layer as well

My reviews on the library/tool:

Positives

• Nice to have in your arsenal as provides you with most of the plumbing;
• Fast and easy to get up and running

Deltas

• Having to mention the command/events in the properties file is not going to scale for larger enterprise based solutions
• Same project/folder can not be used with different Flex applications. Though you can set up different projects, but needs plumbing there. There can be quick ways to manage that in Ant
• Not having a GUI is a turn-off for me. You can not link