Put yosemite.dFF and yosemite.tXD in a folder inside of your modloader folder or remplace the files in your gta3.img...
Remplace the lines in handling.cfg, vehicles.ide, carcols.dat and carmods.dat respectively:

Handling:
YOSEMITE     2500.0    5500.0	3.0	   0.0 0.0 -0.5  90  0.70 0.7  0.46 	5 130.0 20.0 10.0 R P 	7.5   0.65 0 38.0 	0.7  0.08  1.0   0.30 -0.18 0.4  0.0 		0.52 0.10 50000 	222050 		370001 		2  1 	2

Vehicles line:
554,	yosemite, 	yosemite, 	car, 		YOSEMITE,	YOSEMIT, 	truck,	richfamily,	3, 	0,	0,		-1, 1.09, 1.09,		0		

Colors line:
yosemite, 0,0, 1,1, 0,1, 1,0, 2,0, 3,0, 4,0, 6,0

Carmods line:
yosemite, bnt_b_sc_m, bnt_b_sc_l, bntl_b_ov, bntl_b_sq, rf_b_sc_r, exh_b_m, exh_b_l, lgt_b_rspt, lgt_b_sspt, nto_b_s, nto_b_l, nto_b_tw, spl_b_bar_m, spl_b_bbb_m, wg_l_b_ssk

-IonicCleric8076-