Thanks rickyss.
Actualy I`m not modeling with the splines, Im just mocking them up so they work as a "3D blueprint". Then I modeling with polys around them.
And I find it a bit easier that way, and hopefully the result wil be more accurate:roll:
Still im working on the front. Im trying to reduce some of the horisontal lines, and my use of polys around the headlights.