toribio

//no topo:
new pLic[MAX_PLAYERS];
new avioes[] = {592, 577, 511, 512, 593, 520, 553, 476, 519, 460,
                513, 548, 425, 417, 487, 488, 497, 563, 447, 469};

//no OnPlayerSpawn:
    for(new i; i < MAX_VEHICLES; i++)
        for(new j; j < sizeof avioes; j++)
            if(GetVehicleModel(i) == avioes[j])
                if(!pLic[playerid])
                    SetVehicleParamsForPlayer(i, playerid, 0, 1);

//no OnPlayerCommandText:
    if(!strcmp(cmdtext, "/licen�a", true))
    {
        if(!pLic[playerid])
        {
            pLic[playerid] = 1;
            for(new i; i < MAX_VEHICLES; i++)
                for(new j; j < sizeof avioes; j++)
                    if(GetVehicleModel(i) == avioes[j])
                        SetVehicleParamsForPlayer(i, playerid, 0, 0);
            SendClientMessage(playerid, 0xFFF000AA, "Licen�a adquirida.");
        } else {
            SendClientMessage(playerid, 0xFF0000AA, "Voc� j� possui licen�a!");
        }
        return 1;
    }