Vapid Hotknife settings. 
If you have Modloader then the Vehicles.ide, Handling.cfg, Carcols.dat and Carmods.dat settings can 
be simply installed by copying this file in a folder inside ModLoader directory.
Example: 
GTA San Andreas\modloader\Hotknife\Settings.txt

Replace the default line in Vehicles.ide with this one:
434, 	hotknife, 	hotknife, 	car, 		HOTKNIFE, 	HOTKNIF, 	null,	richfamily, 	4, 	0,	 0, 		-1, 0.6, 0.8,		 0

Replace the default line in Handling.cfg with this one:
HOTKNIFE 1400 3400 2.5 0 0.3 -0.3 75 0.75 0.8 0.5 5 200 28 5 R P 11 0.45 0 30 0.8 0.08 0 0.28 -0.2 0.4 0.3 0.2 0.6 105000 40006800 1044001 1 1 0

Remove the default line from car section of Carcols.dat and add the next line in car4 section:
hotknife, 0,0, 3,0, 5,0, 6,0, 13,0, 3,1, 33,2, 127,3

Replace the default line in Carmods.dat with this one:
hotknife, nto_b_s, nto_b_l, nto_b_tw