Offroad wheels, on different vehicles

I'm trying to figure this out myself but I'm just not an expert on how this sort of thing works.

Here's what I did:

I copied the off-road wheel files out of the pickup folder and put them in the Moonhawk folder. I renamed them, then went inside and renamed the important parts, copied the Moonhawk hub code lines and node code lines so they match.

They show up in the drop down menu in game, and seem to even be mounted. But the texture and wheel model doesn't show up. I know there is one more step to do obviously, but I don't know what.

Here's what I'm looking at in game:

(PS: I forgot to take out the last 'front', I know it says front twice haha.)

 

Import the moonhawk to blender or whatever you use and then import the offroad wheels and place them where they should be. This is a guess but it's based off some experiences. When I import the cars to blender they have all the wheels placed over each other in the same spot. I would make a picture (I think I'm a little bit un-clear with my instructions lol) but I'm at school, again.

 

Ah, see that's the part I would like to avoid. I don't have an 3d program or editor, never needed it yet.

When you select the moonhawk with the material editor, you get a list of everything the moonhawk 'has', I would like to add the off-road wheels to that list. I thought there might be a simple way to do that.