Have you done this? 
3) Replace lines in handling.cfg: 
STREAK      5500.0   65000.0   3.0    0.0 0.0  0.0  90  0.58 0.8  0.5  	4 110.0 20.0 20.0 R D 	03.17 0.40 0 30.0  	1.4  0.06  0.0   0.45 -0.10 0.55 0.0		0.65 0.20 5000  	8			200			0  1	2 
4) Replace lines in vehicles.ide: 
538, 	streak,		streak,	 	train, 		STREAK, 	STREAK,		truck,	ignore,	 	10,	0,	0,		-1, 1.06, 1.06,		-1 
570, 	streakc,	streakc,	train, 		CSTREAK,	STREAKC,	coach,	ignore,	 	30,	0,	0,		-1, 1.06, 1.06,		-1 
5) Replace lines in carcols.dat: 
streak, 1,3 
streakc, 1,3