Hi,
scanning older threads on forum I came across this one.
If you still need the described custom ordering feature(s), please take a look at the plugin below. I’ve created the plugin for my personal needs. After making it more mature on my personal field I’ve exposed it via github to others. Lightweight and non intrusive.
As I understand, you need to set a specific sort order for selected folder(s). If I get the intention right, the plugin could be a perfect fit