[c-middia]

you may need to make a var so this script wont interfere with game modes that use checkpoints...

pawn Code:

new usenav[MAX_PLAYERS];//add this at the top

public OnPlayerEnterCheckpoint(playerid)
{
    if(usenav[playerid] != 0)//make your check
      {
      PlayerPlaySound(playerid, 1058, 0.0, 0.0, 0.0);
      DisablePlayerCheckpoint(playerid);
      GameTextForPlayer(playerid, "~w~You have~n~~y~arrived", 5000, 1);
      usenav[playerid]=0;//set back to zero
      return 1;
    }
    return 1;
}

    if(strcmp(cmdtext, "/pd", true) == 0 && usenav[playerid]==0)//example
    {
    SetPlayerCheckpoint(playerid,1529.6,-1691.2,13.3,4.0);
        GameTextForPlayer(playerid, "~w~Nav SYS set ~g~Los Santos PD", 5000, 1);
       usenav[playerid]=1;//set 0ne or w/e
        return 1;
    }