Possible to add nests in indicator menu?

 
Hi, I'm wondering if it is possible to add nested menus for my indicators.

As I write stuff, the INSERT::INDICATORS::CUSTOM submenu gets really crowded. I know it's easy to move files around that you aren't using, but a better solution would be nested folders so you could keep different projects in different places, and still have them on hand when you want to work on them.

So, any ideas anybody?