You don't need to use the same body has he does. You can follow it using any body, you'll obviously have to make adjustments accordingly.
And as I said, his is the only 3D modeling tutorial for Skyrim when it comes to armors.
For textures..
http://tesalliance.org/forums/index.php?/tutorials/article/57-texturing-101/
http://tesalliance.org/forums/index.php?/topic/4682-guest-workshop-basic-texturing-tutorial-part-1-ps/
https://www.youtube.com/watch?v=lDguYkXuiwo&list=UUPH705P7CPoAbAQvJmI7uYg&index=5
https://www.youtube.com/watch?v=Sq-b7Df6__Y&index=4&list=UUPH705P7CPoAbAQvJmI7uYg