Installation instructions:
Place tourmav.wft and tourmav.wtd in vehicles.img
Copy the following handling/carcols/vehicles lines into handling.dat/vehicles.ide/carcols.dat


Handling.dat
TOURMAV  	12000.0  10.0  75 	0.0 0.3  0.0    	0.0  1  0.30  1.0 160.0	0.4  0.60 0.7  35.0		0.65 0.60  8.0 0.10 0.5 		1.5  1.5  1.5  0.20 -0.05 0.0  0.6			2.0 1.0 5.0 1.5 	0.0  52000 		2044000		401000			0

$	TOURMAV		0.58	0.03	0.4		-0.20		0.002	 0.004	0.10	 0.010	0.20	0.001 	1.0		3.0		0.2	 1.0  0.0		0.05	1.0 	0.9 	1.0			0.8		0.8		1.0
Carcols.dat
tourmav, 	113,113,0,

Vehicles.ide
tourmav,	tourmav,	heli,		TOURMAV,		TOURMAV,		VEH@VAN,	VEH@VAN_FO1_FO1,	100,	999,		0.2001, 0.1176,	 	0.0,	4,	8	,0,	noboot+livery+big+ext_all+ext_requi

Make sure to backup your files, I'm not liable if anything breaks!