USE MODLOADER AND PUT THE .TXT TOGETHER WITH THE .DFF AND .TXD IN THE SAME FOLDER
(or add it manually in the vehicles.ide)

The only change I made to the original line is the rear wheel size. 
If you want to replace another car with the Bestia, make sure to make the rear wheels larger than the front ones.
Otherwise the car will look bad.

The numbers that control the wheel size are the two (0.7 and 0.8) before the last number (0)
The first number being front, and second one being rear.

535, 	slamvan, 	slamvan, 	car, 		SLAMVAN, 	HERMES, 	null,	richfamily,	4, 	0,	0,		-1, 0.7, 0.8,		0