This version is a little more complicated in that there are two templates, but I've tried to set it up as simply as possible.

This Template is for the red part of the mesh. Input this one in the first material box in previewer.

This Template is where the pants flare out. The only part you are concerned with is backlit in blue. I added the top of the pants as a reference point to make it easier to line up your textures. This one goes in the last material box in previewer.