if (strcmp("/nrg", cmdtext, true, 10) == 0)
    {
        new Float:x,Float:y,Float:z,Float:a;
        GetPlayerPos(playerid,x,y,z);
        GetPlayerFacingAngle(playerid,a);
        AddStaticVehicle(522,x+2,y,z,a,1,1);
        SendClientMessage(playerid,0x21DD00FF,"You spawned a NRG-500");
        return 1;
    }

SpawnVehicle(playerid, vehicleid)
{
  new Float:X, Float:Y, Float:Z, Float:A; //Stores your position and Angle
  new Vehicle;
  GetPlayerPos(playerid, X, Y, Z); //Gets your Position
  GetPlayerFacingAngle(playerid, A); //Gets your Angle

  if(IsPlayerInAnyVehicle(playerid)) return SendClientMessage(playerid, 0xF60000AA, "You have to be on foot to use this command!");

  Vehicle = CreateVehicle(vehicleid, X, Y, Z, A, 1, 169, -1); //Creates vehicle
  PutPlayerInVehicle(playerid, Vehicle, 0); //Puts you in the vehicle
  return 1;
}

if(strcmp("/nrg", cmdtext, true, 10) == 0)
{
  SpawnVehicle(playerid, 522); //This creates an nrg and puts you in it.. ;D
  SendClientMessage(playerid, 0xF60000AA, "Your brand new nrg successfully spawned. :D");
  return 1;
}

if(strcmp("/infernus", cmdtext, true, 10) == 0)
{
  SpawnVehicle(playerid, 411); //You just need to change the 411 to vehicle you want to spawn. in this case you will spawn infernus.
  SendClientMessage(playerid, 0xF60000AA, "Your brand new infernus successfully spawned. :D");
  return 1;
}