I am trying to simply edit the mesh using the MDT tutorial, and then export it to my map so I can test it. The first thing to notice are the texture maps being completely out of place, as you can see in this image:

I thought I would ignore this and simply focus on editing the mesh to then export it. But upon having edited the mesh to my liking (I created a hole inside the hangar, which cannot be seen in the picture above) and exporting it to BF1942, all I see is the default, untextured mesh, with no collisions. The hole that I created in the mesh is there though.
Here is what I have done to edit the building mesh. I am using 3dsMax 2010 on Windows 10 Home Edition 64-bit, if this can help in any way. I am also running the program in Administrator mode. I am using Senshi's BF MDT 2.762 3dsMax script.
First try:
1) Imported the SM file using the Battlefield Tools Import Dialog. Imported only main visible LOD as pointed out in the MDT tutorial
2) Modified the mesh (created a hole on the hangar floor)
3) On the export dialog, I auto generate 6 LODS, then add the main visible LOD (LOD01). I don't check any of the other parameters, and click on export
4) SM + RS files are generated, the files look fine there. I copy them to my mod's Archives, and add them to BC so it can display the new model
5) When testing my map with the model, it doesn't have any collision and the default gray placeholder textures show up
Second try:
1) Imported the SM file using the Battlefield Tools Import Dialog. Imported only main visible LOD as pointed out in the MDT tutorial
2) Edited the main LOD, copied it (LOD01) and renamed it to "COL02". This is the only collision mesh needed for my purposes, as my mod doesn't use vehicles and so no vehicles will collide with the mesh
3) Created a bounding box using the terminology indicated on the MDT site
4) Hit Export, use the COL02 mesh + the bounding box. No problem with the file creation, however the SM file is significantly bigger than when using the first method
5) After copying the files to my mod and BC, the same problem happens (no collision or textures)
Has anyone had issues with editing existing stock building meshes before? I have tried just about anything now. Is this error caused by running the program in Admin mode? Help would be appreciated!
Regards,
Classical Modder