There should be an option for what type of attack you want each phase to be in the game options. And are you asking if the warthog can literally be the bomb? As in you have to arm the warthog? If so, I don't think so. You could make it a capture point, but the bomb spawn is a specific item, so I don't think it can be a bomb.
Well, people have made it where you could capture the vehicle in Invasion. So it isn't unlikely that a warthog could be a bomb.
Nothing can be a bomb or flag. It will just spawn right next to it. However, you could set it so that you have full vehicle use when holding the bomb, pick it up, and then DRIVE the hog while holding the bomb.
damn i was going to make a prison map that ur buds would come and ride the hog into the back of your cell to break you out. tobad
Again, you could set the bomb carrier traits to allow full vehicle use and set arm time to instant and have it be the same, they just have to pick up the bomb first.
Exactly, this works great in my map Didact. You just have to drive any vehicle (while holding the bomb, can be as a driver, gunner or passenger) and you can arm it instant. This creates the illusion of a carbomb.