In file [Game folder]\data\vehicles.ide
Find the line that starts with
482, 	burrito, 	burrito, 	car, 		BURRITO,	BURRITO, 
Replace found line with
482, 	burrito, 	burrito, 	car, 		BURRITO,	BURRITO, 	van,	normal, 	10,	0,	0,		-1, 0.7, 0.7,		-1

In file [Game folder]\data\handling.cfg
Find the line that starts with
BURRITO 
Replace found line with
BURRITO      1900.0    5000.0   2.5    0.0 0.0 -0.2  85  0.60 0.87 0.51 	5 150.0 25.0 20.0 R P 	8.5   0.45 0 30.0  	1.3  0.07  2.0   0.40 -0.25 0.4  0.5		0.2  0.50 26000 	1			400000		0  1	13

In file [Game folder]\data\carcols.dat
Find the line that starts with
burrito, 
Replace found line with
burrito, 41,41, 48,48, 52,52, 64,64, 71,71, 85,85, 10,10, 62,62