gtasa/data/handling.cfg
URANUS       1700.0    3100.0   2.7    0.0 0.3 -0.15 85 0.78 0.85 0.5       5 205.0 28.0 6.0  4 P   6.0   0.52 0 35.0   1.0  0.18  0.0   0.28 -0.10 0.5  0.3        0.16 0.70 100000    40002004    4000001     1  1    1

gtasa/data/vehicles.ide
558,	uranus,		uranus,		car, 		URANUS, 	URANUS, 	null,	executive, 	7, 	0,	0,		-1, 0.68, 0.68,		1

gtasa/data/carmods.dat
uranus, exh_a_u, exh_c_u, fbmp_a_u, fbmp_c_u, nto_b_l, nto_b_s, nto_b_tw, rbmp_a_u, rbmp_c_u, rf_a_u, rf_c_u, spl_a_u_b, spl_c_u_b,

gtasa/data/carcols.dat
uranus, 0,3, 2,3, 3,2, 11,2, 28,0, 44,1

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