Recompiling several models together breaks their textures

So, i recently reinstalled 3ds max and started toying around with WallWorm. Using it, i recently imported a bomb model which i then scaled down and recompiled. No issues there.

Now, i'm trying to do something similar which includes several props (it's going to be the interieur of a custom mvm upgrade station). With the bomb, i didn't need to do any work for the new model to simply reuse the textures and materials of the model it was based off. Now, however, the textures for my model break.

This is what it looks like in 3Ds max. In hlmv/hammer, i get the missing texture thing.

So my question is, how would i go about making sure the props uses the textures and materials already in the game? I'm guessing that the fact that i have several models attached to each other somehow breaks whatever keeps track of the textures.

Forgive me if i'm not too articulate at the moment, but i've been puzzling with wallworm and propper all night with next to no progress and i'm absolutely clobbered.

After a good nights sleep i got it all sorted out.

Aly correctly guessed that the material directories got botched, so i used crowbar to compile the model with a custom qc file (rather than using wallworms auto generation feature) and that did the trick.

Thanks y'all