Is it possible to have two different textures on two different items of the same type?
For example: I grab one item, and duplicate it. Can these two items have different textures and how?
I'm not sure what you mean, but yes you can duplicate the existing bear trap model and rename it beartrap02, then place the texture you want to use for that duplicate trap in the same folder as the texture for the original trap. To make it easier, the texture should have the same name (beartrap02 or whatever you want to name it). Then, you need to add your texture into your plugin, and to do that just go to file...create archive, then click on the texture you just put into the directory and drag it into the window, then hit pack files.
Next, you're going to need to go back to your trap, then right click and hit edit, then click the edit button next to the
models box, and drag your replacement texture in there. The new texture should now be visible in the render window on your duplicate trap.
That's not really an absolute truth though is it trees415? If he wants to retexture the bear traps, then he can do what he likes. Every texture makes a difference, a poor texture in one place makes the rest seem out of place equally as much, and if he's new to texturing starting small is definitely ideal.
I never said he shouldn't do it, I was just saying it's going to be a difficult texture to produce with clear and recognizable detail. It was mainly based on the assumption that he was just doing this as a texture replacement mod, but that doesn't seem to be the case.