Thanks Burr and Michael for answers
Yes:NSIDED works well in many situations,now i know is G1
Agree with you Michael...about car-modeling there is a plug-in in Cinema4D that works well :

http://www.c4dplugin.de/splinepatch/splinepatch_en.html

I have it, but my modeling environment is MOI (i'm addicted :) )

M