Next time, don't crosspost your questions! It's bad I tell ya
No really, don't. Wait for a response in that forum or put it in the right forum directly. If you made a mistake, ask a moderator to move it.

Code:

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function tile_sprite (amount_of_tiles, tile_width) {

  var counter; 
  while (counter < amount_of_tiles) {
    //put a tile on an increasing x-axis position
    ent_create ("tile.pcx", vector (counter * tile_width, 0, 0), null);
    counter += 1;
  }

}

tile_sprite (15, 64); //15 = amount of tiles, 64 = width of the bmap (in this case tile.pcx)

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Like that?