The Infernus comes with 2 extras...
1- Regular (Wingless)
2- extra1 (Wing from the Final Infernus)
3- extra2 (Wing from the Beta Infernus)

Also comes with 2 versions...
1- Version without coustom wheels.
2- Version With Custom Wheels. (YOU HAVE TO INSTALL Dmagic1 WHEEL MOD IN ORDER TO WORK)

INSTALLATION...

1) open gta3.img and replace "infernus.dff" "infernus.txd" with the new one.

Some notes:

A) to make it simple download GGMM and go to "Installer" and go to "manual mod installer" then insert dff txd and col Link for GGMM: https://www.gtagarage.com/mods/show.php?id=434

B) or use modloader :P

YOU have many MANY choices to replace the dff and txd.

2) (FOR THE CUSTOM WHEELS VERSION) open default.ide and replace infernus line with the new one:

NEW LINES:

141, 	infernus, 	infernus, 	car, 	INFERNUS, 	INFERNS, 		null,	executive, 	7, 	6,	0,		249, 0.74