A tool I wrote to manage multiple PRT Loaders in a scene. It was especially useful for updating files when I was using one cache for multiple loaders with an offset, since Instancing wasn't an option. Aside from that, there are simple controls to update some of the main PRT Loader attributes quickly and on multiple loaders.
Here's a quick demonstration video of the tool >>> https://vimeo.com/130000485
Cheers!