I recently realized that I could copy paste most of my code into JavaScript to create JSON strings to load into the custom objects. I created a JSFiddle if anyone want to toy with it. http://jsfiddle.net/gznE2/

Keep in mind FuSeGa uses a very poor syntax, so you'll probably have to mess a lot with it. And you should also probably delete the parts in the script that you don't need or it will overwrite existing content. If you load custom content, a button on the main screen will appear that lets you delete all custom content.

Custom content is ADDED and only overwrites existing content by name, so if you create some content you can share the JSON texts to allow other people to play with your mods. Have fun.