I installed the lav-25,the abrams pack and the l2a6.When I chose the machine gun turrents work fine but every time with main cannon turrents simply don't rotate but shells would still hit where I aim.Looks like magic.

@V4D3R Thanks a lot

@V4D3R How?

I downloaded an Add-on car mod.Installed it as the readme said.Everytime I try to spawn the car by code the game tells me "Model Unavailable" and fail.The dlc.rpf is already in the dlcpacks folder.
Sorry for my broken English.