If you want to install Droplets during installation of your module you have simply to do this:
Place the Droplet (for example 'droplet_name.zip' ) that should be installed in a directory /install in the root of your module.
Then simply add following code to the install.php (or upgrade.php) of your module
// install droplets
and you are done.
To uninstall droplets please use
For further informations and more methods please use core documentation.