Task Managment (Projects, Folders, Tasks) and so on ?!?!

Hi All,

I use Wrike as a project management system. Now I have installed ERPnext then I want to use the project management module instead of Wrike, the issue I’m facing is that I can only have Projects and Tasks but I need to create folders under my projects to group tasks in one place (please don’t say “Is Group” because it’s not working for me) I need to have an interface showing the following sequence:

1- Project
1.1 Folder
1.1.1 Task
1.1.1.1 Sub-Task
1.1.2 Sub-Folder… and so on
1.2 Task… and so on