Carcols.dat:
hotrina, 1,1

Carmods.dat: (add these lines in the correct spot)
hotrina, nto_b_l, nto_b_s, nto_b_tw

Handling.cfg:
HOTRING      1600.0    4500.0   1.4    0.0 0.2 -0.4  70  0.85 0.80 0.48 	5 220.0 26.0 5.0  R P 	10.0  0.52 0 30.0   1.5  0.10  10.0  0.29 -0.16 0.6  0.4		0.20 0.56 45000 	40002004	C00000		1  1	0

Vehicles.ide:
502,	hotrina, 	hotrina, 	car, 		HOTRING, 	HOTRINA, 	null,	ignore, 	5,	0,	0,		-1, 0.81, 0.81,		0

Done!