CMD:mittomén(playerid, params[]) {
new string[32];
if(sscanf(params, \"s\", string)) return SendClientMessage(playerid, 0xFF0000FF, \"/mittomén [rendszám\");
SetVehicleNumberplate(GetplayerVehicleID(playerid), string);
return 1;
}

tesztelve.. 100%

#include <a_samp>
public OnFilterScriptInit()
{
print(\"\\n--------------------------------------\");
print(\" Jármû Rendszám!\");
print(\"--Bluebay--Strumm---\");
print(\"--------------------------------------\\n\");
return 1;
}
public OnPlayerCommandText(playerid, cmdtext[])
{
if (strcmp(\"/rendszam\", cmdtext, true, 10) == 0) {
new Float:x,Float:y,Float:z,Float:ang;
GetVehiclePos(GetPlayerVehicleID(playerid),x,y,z);
GetVehicleZAngle(GetPlayerVehicleID(playerid),ang);
    if(!IsPlayerInAnyVehicle(playerid)) return SendClientMessage(playerid,0xFFFFFFFF,\"Nem vagy jármûben!!\");
    ShowPlayerDialog(playerid,0,DIALOG_STYLE_INPUT,\"{EE7777}Jármû Rendszám\",\"{00CC66}Írd be a használni kivánt rendszámodat!.\",\"Ok\",\"Mégse\");
return 1; }
return 0;
}
public OnDialogResponse(playerid, dialogid, response, listitem, inputtext[])
{
if(dialogid == 0) {
if(response) {
            new Float:x,Float:y,Float:z,Float:ang;
            SetVehicleNumberPlate(GetPlayerVehicleID(playerid), inputtext);
   GetVehiclePos(GetPlayerVehicleID(playerid),x,y,z);
   GetVehicleZAngle(GetPlayerVehicleID(playerid),ang);
   SetVehicleToRespawn(GetPlayerVehicleID(playerid));
   SetVehiclePos(GetPlayerVehicleID(playerid),x,y,z);
   PutPlayerInVehicle(playerid,GetPlayerVehicleID(playerid),0);
   SetVehicleZAngle(GetPlayerVehicleID(playerid),ang);
} else {
      SendClientMessage(playerid,0xFFFFFFFF,\"A \'Mégse\'-re mentél!\"); } }
return 1; }