The steps to use resource modules can be found in my own post, and here.

The code snippets here refer to my post.

Although compiling resource modules is not built-in in Flex Builder, you can compile resource modules by using Flex Builder by adding a builder to your project as follows:
 

1. Right click on your project->Builders. This shows you the list of builders used for building your project. If you haven't added any builder, you should only see the "Flex" Builder.