Thats why I said above it would as far as I can tell have to be done through a sub menu group, scripted up in the phones lua file,
or you could try seeing what could be added as cheats you can pretty much give your self almost any thing I would think using custom cheats only downside its not realy a shop then if you gota type in name of everything you want and when I finish the weapons menu if its possible that is im going to name mine in the style of an App, ill prob add in custom Icon to make it look like an app aswell