While the OP's immediate concern seems to have passed, I was curious about something regarding anti-vehicle weapons.
What if such weapons (Anti-Vehicle Mines, Anti-Armor Rockets, etc.) had Vicious (or a vehicle-specific variant) applied to them?
Also, how much of a difference would it make if the GM allowed Aim maneuvers to target weak points, and either reduced the target's effective Armor or boosted Criticals?