I'm really not familiar with these stuff, do you have a tutorial
i've tried texture stuff a couple of times (not that great at it) but i've always just done in blender:
1. color the different areas on the model different colors
2. UV unwrap the model (it should be on the side menu assuming you use the latest version of blender)
3. open up the texture in paint/gimp or something and paint/slap images on the areas you color code
4. theres your new texture