Making guesses: If the square moves with your figure, it is probably parented to the figure. Go to the hierarchy window and unclick it. Better yet, do some of the neat things Kalypso suggested- I'm writing all of that down (except the script- I'm on P5). If your square is for a far away background, I'd probably add it last. It's easier to fool with the size of the square in proportion to your characters, than vice-versa. The main problem you might have is getting your image to the correct scale. That will take trial and error. In the material room, on that box for the texture map plugged into the square: U-Scale and V-Scale make the image smaller or larger on the square (working like X and Y scales, where 1.0 = 100 %), and U-Offset and V-Offset change the positioning of the image on the square. If you want it to tile, the way I do it is plug a tile node into the diffuse first, then plug an image into the tile mode. Change the tile and color borders to white. I hope that's helpful to you. I'm not exactly sure I understand what you're trying to do, but I think I have a grasp.