Cheval Picador 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\Cheval Picador\Settings.txt

Replace the default line in Vehicles.ide with this one:
600, picador, picador, car, PICADOR, PICADOR, null, normal, 6, 0, 0, -1, 0.7, 0.7, 0

Replace the default line in Handling.cfg with this one:
PICADOR 1500.0 3400.0 1.7 0.0 0.2 -0.3 75 0.63 0.81 0.52 5 168.0 34.0 108.0 R P 3.7 0.97 0 30.0 0.38 0.11 2.0 0.04 -0.15 0.4 0.3 0.11 0.20 26000 40112040 104004 0 1 0

Remove the default line from car section of Carcols.dat and then add this line in car4 section of Carcols.dat:
picador, 61,1,25,25, 70,1,83,25, 26,1,81,25, 27,1,84,25, 83,1,110,25, 79,1,84,25, 59,1,25,25, 89,1,81,25

Replace the default line in Carmods.dat with this one:
picador, bnt_b_sc_p_m, bnt_b_sc_m, bntl_b_ov, bntl_b_sq, exh_b_l, exh_b_m, exh_b_ts, lgt_b_sspt, nto_b_l, nto_b_s, nto_b_tw, rf_b_sc_r, wg_l_b_ssk

The vehicle name is defined inside Picador.fxt. It's inside "Bonus\In-game name\cleo\cleo_text" folder of the archive.
That file must be installed in ...GTA San Andreas\cleo\cleo_text. You can do this by copying the cleo folder.