You can run this command at any time. It will interactively prompt you if you want to overwrite your existing files, and give you a diff. (Or you can say --force to force overwriting of existing files). You can also run ./script/destroy mongrel_deploy_files to remove anything created by the generator.
This process will add two files in umlaut_config/deploy, and one file in $UMLAUT/script/local/. Next, you need to hook up apache, and start your mongrels.
=== default assumptions ===