gtasa/data/handling.cfg
SUPERGT      1400.0    2725.3   1.5    0.0 0.0 -0.25 70  0.70 0.8  0.50 	5 240.0 35.0 10.0 4 P 	30.0  0.51 0 40.0  	1.2  0.19  0.0   0.25 -0.10 0.5  0.4		0.37 0.72 95000 	40002004	C04000		1  1	1

gtasa/data/vehicles.ide
506, 	supergt, 	supergt, 	car, 		SUPERGT, 	SUPERGT, 	null,	executive,		10, 	0,	0,		-1, 0.7, 0.7,		0

gtasa/data/carmods.dat
supergt, nto_b_s

gtasa/data/carcols.dat
supergt, 3,11, 2,0, 44,0, 1,11, 0,11, 6,11

get that mod car colors make your game more cool ;)
http://www.gtainside.com/en/sanandreas/mods/86342-car-colors-mod/