you can add 32 paths, but if you create models or images etc from script, you can tell to use these from the folder by writing "./pathfolder/file.ext".
This way you can use items from subfolders, without having to add the folder specifically...

Again, if it's for example a model dependant on a level, and both are in different folders, you have to add each of this folder. otherwise, non-dependant assets can be loaded like above.

regards,