[MenaceX^]

pawn Код:

if(!strcmp(cmd,"/changeplate",true))
{
  new string[64];
  if(!IsPlayerAdmin(playerid))
    return SendClientMessage(playerid,0xFFFFFFAA,"You are not authorized to use this command.");
  if(!IsPlayerInAnyVehicle(playerid))
    return SendClientMessage(playerid,0xFFFFFFAA,"You have to be inside a vehicle.");
  if(cmdtext[idx++] != 32 || cmdtext[idx] == EOS)
    return SendClientMessage(playerid,0xFFFFFFAA,"USAGE: /changeplate [newplate]");
  format(string,sizeof(string),"%s",cmdtext[idx]);
    return SetVehicleNumberPlate(GetPlayerVehicleID(playerid),string);
}

It should work, I guess, though I had never worked with this before.