Put the car, torque curve and engine sound information files from in this folder (.CRV, .CCA, .TXT)

In the carinfo.cca:
- Remove the section below --- AI ---
- Add an extra line at the bottom of the --- Positions --- section. This will specify where the engine smoke will originate from. Set to "0 0 0" for now, all cars had the smoke originate at 0 0 0 in the old game.
- Cut the entire --- Tuning --- section out and paste it into a different text file, which we will soon modify
- Make sure that there is precisely ONE empty space above and below every section header

In your temporary text file:
! - You will go from something like this:

--- Tuning ---

2

// Sports suspension
name=susp1 add_trackfront=0.1 add_trackrear=0.1 add_wheelposyfront=-0.02 add_wheelposyrear=0.0 springstiffness=2.0 springrange=0.3 springdamping=1

// Offroad suspension
name=susp2 add_trackfront=0.2 add_trackrear=0.2 add_wheelposyfront=-0.05 add_wheelposyrear=-0.05 springstiffness=0.8 springrange=2 springdamping=0.8  scale_shadowx=1.1

! - to something like this:

name=susp1 add_trackfront=0.1 add_trackrear=0.1 add_wheelposyfront=-0.02 add_wheelposyrear=0.0 springstiffness=2.0 springrange=0.3 springdamping=1
name=susp2 add_trackfront=0.2 add_trackrear=0.2 add_wheelposyfront=-0.05 add_wheelposyrear=-0.05 springstiffness=0.8 springrange=2 springdamping=0.8  scale_shadowx=1.1

! - Basically, you are removing the lines starting with the "//" prefix, and removing the empty space between tuning items.
- Once you are done with that, you can copy all of the temporary text file's contents, and paste them into the def.tun file I included. Remove all the tuning items that are already in the file. Basically, you will keep the first 3 lines, and replace everything after that. Then you update the number of tuning items to match the amount you have entered.