Hi gubar i wasnt sure wat u meant.i used polys to start of with modelling it as a whole and den spliting it into diff parts of the car, after spliting each parts i den worked on dem / modified to fit properly, once i was ok i coverted to subD to add creases were necessary. and the reasons y i reversed bak to poly was because it was easy on my graphics and also because i had to use mentalray to render in mentalray with subD's all the creases gets messed up so converting it to poly does the job all i had to do was harden some of the edges to fix minor deforms

hp dis explains or give more light into how i did it