Hey,
To achieve your goal, your will have to look into the following links:
addAction - To add a scroll wheel option
hint - Message if blue/red wins ect.
Finally for the smoke on player, try something like this: (hasn't been tested)
_smokeRedgear = "SmokeShellRed" createVehicle (position player); _smokeRedgear attachto [player, [0,0,0]];
Wish you luck,
Chris