Replace

vehicle.ide
-------------------
601, 	swatvan, 	swatvan, 	car, 		SWATVAN, 	SWATVAN, 	coach,	big,	 	4, 	0,	0,		-1, 1.366, 1.366,	-1

carcols.dat
-------------------
swatvan, 37,1, 110,0, 122,1

handling.cfg
-------------------
SWATVAN      5000.0   10000.0   2.5    0.0 0.0 -0.1  85  0.65 0.7  0.46 	5 110.0 24.0 25.0 4 D 	6.4   0.45 0 27.0  	0.7  0.08  1.0   0.30 -0.18 0.5  0.0		0.32 0.06 40000 	880010		1000000		0  1	15