This is the latest version of my Enhanced Citizens addon, if you notice any problems with the .qc or .smd files please make a pull request to change them.
I've designed the files to make for easy editing and compilation, all of the main model qc files are in the root directory, and they use $include, $pushd, and $popd to make it easy to edit all of them at once. base_male and base_female contain all of the smd files that are used for bodygroups, and also contains subfolders for model-specific bodygroups such as beanies and glasses. The torso and legs are shared across all of the files, making it easy to make additions.