I'm working with this model, bought here on Renderosity:

http://www.renderosity.com/mod/bcs/index.php?ViewProduct=95050

The cargo container/box comes in the red shade with the logo, as shown.  I want to make some custom ones.  

So I look in ...RuntimetexturesSpaceTrucker02 per the docs and there's a variety of JPGs there.  One looks exactly like the red-colored box in the promo art.

I take that JPG into photoshop and dress it up the way I want, and save it under a new name.

Now...how do I "apply" it to the fiture?  I thought this would be in the Material Room, but maybe not.  I'm using Poser Pro 2014.

When I load the prop (the cargo container) into Poser, it comes in with the red JPG already applied - looks just like the promo art.  But I can't find where that is specified.  

Here is what I see in the Material Room for the prop:

So in other words, with THOSE settings, it's giving me the red box with the logo.  So evidently none of those settings are pertinent.

I look at the main ship model, I see image maps and nodes...but not for the box:

I just can't find where I would change the JPG that's being used.  I admit I'm a novice in the Material Room.  Maybe it's somewhere else?

It did come with a UV templates .zip, though I haven't looked at that.

At the moment the prop's parent is UNIVERSAL - setting its parent to the main "space truck" figure didn't make a difference.

Been reading the reference manual but haven't found anything yet...