in my little editor you can find some multitexturing solutions including a compatible texture editor for ffes/shaders. it is good to keep a main texture on the 1st skin to be visible in mirror views like water. so I use 1st skin as 24 bit main skin, and the others are 32 bit tiled textures, blending is on their alpha. and the main texture also can be blended in, to lower the visual effect of repeated tiled textures. the latest auto texturing shader is not released but works simply by sampling height and slope.