The solution above works with a6.40 version. Unless you are using A5 engine, i dont know why you are using A5 templates, so i cant help you cause i never use templates.

If you have the latest version upgraded you will see that MED can do the texture tiling (tile+ tile- buttons) and you just have to make those two skins as mentioned and apply mipmaps in the detail texture and remove mipmaps from the first (MED apply mipmaps by default).

About the shaders stuff just search in the wiki page. There are a detail map fixed function effect that you can eventually use.

Hope it helps.