[-CaRRoT]

Код:

for(new i = 1; i < 2,147,483,647; i++)
{
      if(!VirtualWorldTaken[i])
      {
	  VirtualWorldTaken[i] = 1;
          SetPlayerVirutalWorld(playerid, i);

^ That would be an example to check if the VW is taken or not, if it is - then it will check the next and set it for the player.

You can make your code around that.