GTA:VC Burnout Smoke and Exhaust Flames by DarkSyde

Step 1)

Rename your original particle.cfg (for example, _particle.cfg)

Step 2)

Drag and drop either of the 2 included particle.cfg files into C:\Program Files\Rockstar Games\Grand Theft Auto Vice City\data (or wherever you have the game installed).  Take your pick between smoke and flames or just smoke.
Drag particle1 to have Flames and Smoke
Drag Particle2 to have just smoke

Thats it!  Enjoy!

I take full credit for this 'mod' (term used loosely) as I edited the files on my own, all by myself, with no input from others.  All it takes is a little simple text editing in notepad.