create sub-folder in document module

[joebordes]

This is a very complicated request which requires a lot of programming. You have to change the current folder picklist for a module related with itself in parent-child mode, then modify all the code to achieve a decent output and GUI.

Let's step back a little. What problem do you have? I mean try to explain why you need subfolders, what is the business problem you are trying to solve?