RobotStudio event

Does ABB have kinematic model with additional 7'th axis?

Would it be possible to create 7 axis robot the way that 7'th rotational axis is connected to axis 6? Is it possible to perform interpolated movements (MoveL, MoveC) in this new 7-axis robot coordinates?
Is it possible to create this configuration by itself or should it be pre-configured by ABB?
Thank you!
Fritz.