Ps3 – Bad Company 2 Vietnam compatibility

You need to equip this part of your class's vehicle specialization:

Alternate Weapon Package

A weapons package that upgrades the targeting systems of vehicles and helicopters. It extends the effective range and accuracy of mounted weapons. - Adds an alternate weapons to the vehicle. Such as the M1A1, will have a secondary machine gun that you can control along with your main gun.

Its a vehicle specialization and requires 10,000 vehicle experience points to unlock.

More details here.

Well, it's a remake of 2004's Battlefield Vietnam only in the broad sense that it's a similar setting.

I do not think it's a true remake -- in the sense of having the same maps, same gameplay, and exactly the same vehicles and weapons as the 2004 game.

From what I have read, it'll be the same (awesome) core BF:BC2 gameplay, but transplanted to new jungle maps, vietnam-era weapons, and vietnam-era vehicles.

The [Vietnam] expansion pack will contain 4 new maps, 6 new vehicles, and 15 new weapons. It is also planned to include 49 contemporary music tracks which can be listened to via an in-game radio as well as new voice overs for both American and Vietnamese forces, based on authentic communication from the Vietnam war.