If you don't want to install that, then you can skip steps 1 & 2 and instead make your own creative design for a cannon.
NOTE: You will need to have the Phoenix model pack, available for download here. This is surprisingly easy to make, and I'm sure you won't be displeased with the results. Flaming Explosive Barrel Cannon War Devices: Flaming Explosive Barrel CannonĪ cannon that is simple and easy to build, but that is also very effective.