Folders for Textures, Models, etc.

Please add the ability to put textures, models, sound files, and structures in folders. Personally I am making a mod which adds a lot of weapons all of which are made out of a lot of different resources making different textures for each weapon, but there's no way to make a folder for each type of weapon or type of crafting resource used. If this is added it would be a godsend when it comes to organization of textures and such which all struggle from the same issue that mod elements did and that's having too many... at least for me :I