Ever wanted to shoot two rocket launchers at the same time? Now you can! Just extract the .bin file to the dropzone folder and be on your way! One thing to remember is that it does not affect DLC weapons. Another thing is that if you want a specific two handed weapon in your two handed weapon slot, grab that weapon before you load up the mod. If you exchange it for a DLC weapon that goes into the two handed slot, you won't be able to get the original weapon back into the two handed slot. Don't worry about not being able to pick up ammo, as you'll still be able to get ammo for a weapon in the two handed weapon slot.

Forum thread:

http://www.videogamemods.com/justcause2/index.php/forum?func=view&catid=22&id=5269#5269