Speed Rexen

Ok, I cant figure out the script for this. What I am trying to accomplish is to give a texture that is displayed on a prim (full perm textures of course so no issue there) that are stored in the root prim and displayed on a series of display prims. on touch of the display prim I want to give the texture that is displayed but since that texture is not in that prims inventory I cant seem to get it to work. This is my first attempt at making multiple display tiles and I have everything working correctly except when it comes to giving the texture that is displayed. I can make this work no problem when the root prim is the display tile, but I cant seem to get this to work with the textures stored in the root prim and displayed on a linked display prim. Can anyone help or point me in the right direction. Thanks.