JavaScript File System class

Hi,

a few days ago Jason posted information about a JavaScript File System class, which is part of Node.js: http://nodejs.org/dist/v0.8.14/docs/api/fs.html. Unfortunately I could not take advantage of his hint, because I could not come to grips on how to "include" this class into a JavaScript. A "receipe" how to do this would be incredibly useful! I could not figure out, for instance, how to make "require()" available in the script that should use File I/O.

best regards

Christian