Is it possible to set up a runtime folder like the following  and have it listed in Poser6 as Animals and then domestic then all the animals that are classified as domestic?

Main Folder-Animals>Subfolder-Domestic>Feline's

I ask as I want to not have 40 or more seperate runtimes but have a set up that if I need a dog I can go to animals>domestic>dog.

Just in case. I want the Animal Folder to be a base runtime (perhaps) and then Domestic as a layered runtime and then feline . I know that makes it 3 deep. But I have poser on it own hdd so space is not a major concern.