Hogmason informed us he released his HOG MHQ script on the BI forums.
This script allows players to deploy a Mobile MHQ with some cover and a fully loaded ammo box.

Quote hogmason :
It has a marker on the map that follows the MHQ and updates its marker name as it is deployed and un deployed.
Players can teleport to and from the MHQ and base.

The MHQ respawns and is fully MP and JIP ready.