Tutorial – Make a vehicle bulletproof

Open the macro of any vehicle (for example CAMION_V.MAC).
Scroll down to the .ACCIONES block. There you'll find the following section:

  acExplotaVeh
  [
    .CARISMA 900 .RADIO 200 .DANO 180 .TIEMPO 200
    .IMPACTOS [ .ATROPELLO 1 .DISPARO 30 .BOMBA 1 .PEPINAZOTANQUE 1 ]
    .SONFIS XPLO
  ]

To destroy this vehicle you'll need one bomb ( .BOMBA 1), 
one hit of a tank ( .PEPINAZOTANQUE 1),
30 rounds of your gun ( .DISPARO 30), …

To make a vehicle indestroyable just set all values of .IMPACTOS to 0.
  .IMPACTOS [ .ATROPELLO 0 .DISPARO 0 .BOMBA 0 .PEPINAZOTANQUE 0 ]

To make a vehicle bulletproof only change the value of .DISPARO to 0.

If you like you can also change the sound of the explosion.
To hear DISPARO1.WAV replace .SONFIS XPLO with .SONFIS DIS1