File structure in the Vault

Currently, it seems files attached in the CAD documents are saved in the vault in a multilevel folder structure which if I understand correctly is a folder named after the second and third letters of the file ID, then with in that a folder named after the file ID. This occurs with every single file, so you end up with a large complex folder structure.   Is there anyway to simplify this to add all files to a single folder, or if not to a set of folder that are named after the first 2 characters of the part number for example?   Thanks Russ