That I don't know.
You're best bet right now is to use Webpack or Browserify (as CommonJS isn't RequireJS-friendly, and you may as well stick with the AMD version of Famous in that case).
I'd say start from scratch (perhaps learning what you can from the skeletons).
Another option could be to use the browserify-seed, which you can then add ES2015 support to. You'd have to add the babelify transform to it, so that it can use Babel to handle ES2015+ language features (including ES6 module syntax). You would then have to replace the dependency of
famous to point to my repo, and remove the
famousify transform, as that is designed for the AMD version of Famous.
Whichever path you choose, it'll involve some work and getting familiar with Webpack or Browserify (personally I'd recommend Webpack, and I think that'll be the easier path). There isn't really a single-step solution. If you need some help with it, just let me know after you've tried and reached a road block. I'm happy to help. :}