Changing a RHIB signal into a supply drop

Pretty straightforward, as the title says in order to turn a RHIB signal into a supply drop you first deploy the RHIB. 

Once deployed bring up /skin. In the nearby tab you should see metal double doors, skin these to any other skin and close the /skin window.

Next hit the RHIB with a salvage hammer to turn it back into a signal. The signal will display as the skinned metal double doors in your inventory.

Equip these metal double doors and throw the signal. What arrives will be a supply drop and not a new RHIB. 

Voila!