[Miguel]

pawn Код:

new Cono[MAX_PLAYERS];

pawn Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
  if(strcmp(cmdtext, "/pcono", true) == 0)
  {
    new Float:pos[3];

    GetPlayerPos(playerid, Pos[0], Pos[1], Pos[2]);
    Cono[playerid] = CreateObject(modelo, Pos[0], Pos[1], Pos[2], 0, 0, 0);
    SendClientMessage(playerid, COLOR, "Has creado un cono!");
    return 1;
  }
  else if(strcmp(cmdtext, "/scono", true) == 0)
  {
    if(!IsValidObject(Cono[playerid])) return SendClientMessage(playerid, COLOR, "No has creado ningъn cono todavнa!");
    else 
    {
      DestroyObject(Cono[playerid]);
      SendClientMessage(playerid, COLOR, "Has quitado el cono!");
    }
    return 1;
  }
  return 0;
}

El modelo del cono lo buscas tъ.