[AAG]

Could anyone explain how to use such tags:
DoorAnim=
DoorStages=
DamagedDoor=

What for are they?

[gamemate]

DoorAnim= The name of the door animation file this works like the active animations.

Remember that you do not specify the amount of frames in the same way so do not add that to the main art code of the door.

DoorStages= The amount of frames used, if you have damaged frames those has to be the same amount as the undamaged and added to the same shp. You only specify the undamaged frames in this section.

DamagedDoor= By adding yes tag to this you tell the game that you have damaged frames of the door anim present in the shp file.

Good enough explaination?

[AAG]

Yes, explaination is good.
And have onyone tested it?
Why this codes are not used in game?

[gamemate]

AR2 uses animated doors so yes it is tested and it works flawless.

The reason it is not used is because of the new vehicle type introduced in RA2, vehicles that act like aircraft. You can´t have door anims if you plan on using these unless you want the doors to open everytime you build a kirov.