Add item to a node's right click popup menu

In my module, I am trying to add an item to a node’s right click popup menu. Specifically, in the Project Browser -> Project -> Scripts -> Script Library tree path, I want to add a custom “export as text file” item to the right click popup menu for each of the scripts within. Is there a way to do this? Thank you!

Got word that this just might not be possible… but I might continue to try to hack at it later.