Using NodeRT modules is now easy as...well..using any other node module :)
The Windows 8.1 versions of the NodeRT modules can now be installed directly from the npm (node package manager).
For example, if you wish to use the Windows.Devices.Geolocation namespace from node.js, all you need to do is to run the following command from you cmd-line:
npm install windows.devices.geolocation
And you'll find the windows.devices .geolocaiton module inside a node_modules folder near you ;)
Before you install your first NodeRT module, just make sure to have the following installed on your machine: