Multiple models for one character.

Hello,
I was wondering if there is a way to use multiple models imported from a 3d Modelling Software as one character in Unity.
For example imagine being able to pick from multiple parts of a car(multiple types of wheels, chassis, windscreens etc) which are then treated as one model and can be used in the game as a regular model would.

I hope my question is not too confusing.
Thanks a lot for reading.

You would have an empty game object to which you child the other object:

var wheels:Transform[];

function AttachWheels(){
wheels = GameObject.FindGameObjectsWithTag("Wheels");
wheels[0].transform.parent=transform;
wheels[0].transform.localPosition(x,y,z);
wheels[1].transform.parent=transform;
wheels[1].transform.localPosition(x,y,z);
wheels[2].transform.parent=transform;
wheels[2].transform.localPosition(x,y,z);
wheels[3].transform.parent=transform;
wheels[3].transform.localPosition(x,y,z);
}

This will find objects tagged Wheels but you would use another way. Then it parent them to the car object holding the script and position them to the proper position compared to the parent object.

You can the objects a child of the main object just drag the objects to the main object and your done as simple as that