Adding droppable objects to helicopters

[Nosecone]

Hi all
I downloaded a mission that drops mud bombs from a fixed wing aircraft.
Is it possible to add the same droppable item to a helicopter?

If I click enable changes in the main mission screen, start the mission I can then choose other aircraft but of course they are not setup to drop items in the mission.
Is there a way to addd the same droppable item to my helicoper and will it work in the mission?

Cheers

Rhys