example_d <---- THIS ONE
example_d2 <---- THIS ONE
example_n
example_s
Those two are what you edit for the actual image. Im not sure about D2, but if D1 doesn't work fully, D2 is needed to be changed also.
_n is for the normal map (pink/blue) that basically makes everything stand out.
_s is the specular map, which is the light reflected off of it and how shiny it it, with whiter areas being brighter
If you are re-texturing something that has all of these, for it to display correctly, you will want to re-do all of them