(Dang, Ruby. Ninja'd me. xD)
Place them ontop of preset_2 for example and see which line represents the nose, eyes, etc.
That you must figure out yourself, make sure you pick the right UV guide though.
There are two kinds of UV guides, for canines and felines.
Example: Fbody.jpg is feline, because of the F infront. And Cbody.jpg is canine, because of the C infront.
I hope you understood, and good luck. xD