In BC2, which vehicle unlocks still work in a not-driver-position

battlefield-bad-company-2

In Battlefield Bad Company 2, which (if any) of the vehicle unlocks are working if you are not in the driver's seat, but e.g. in the tank's gunner position or as a passenger in a helicopter?
Some are easy to test (zoom, smoke), but do increased firepower and increased armor gadgets still modify the weapon / armor?

Best Answer

Alternative Weapon Package: if you're gunner on gunship, you have tracer darts as alternative fire
Improved Warheads Package: according to specs increases damage on all vehicle weapons, thus should also work on gunner
Active Armor Upgrade: vehicle should get upgrade if at least one player in it has the specialization. It's not cumulative (eg. you don't get 2 or more upgrades for 2 or more players with it)