NPC decals also work a bit differently to the player ones in that they're a single colour design, with a different decal design stored in each colour channel and the alpha in the .png- it's so there can be as much variety as possible whilst using as little texture memory as possible.
Your full colour decals look really great though so it would be a shame to not have them in game, i'm a lot out of practise with oxp'ing but I could probably cobble an NPC shader that uses full colour decals - am I right in thinking that it's the normal mapped boa oxz that your using at the moment, just want to make sure I work on the correct shader
I think, I am using the version from your page, not the download manager. Last update per 06 July 2014 - new shaders & materials. It also included a simple way to replace the decal so it was an easy exercise to do there.
However, your information about the color channels at npc decals explains why I failed. My full color designs just didn't match the way of display. If you could give me a helping hand so I could display them I would be very grateful.
Trying to survive behind the controls of a Caduceus Psi XT in Alpha test