I no longer have a laptop, just so I can't bring one with me anymore
As far as the mesh animations, I am working on an export/import function but again have trouble finding a suitable format. I had a format almost working (md3) until I ran into a couple of animations in the dat-file that exceeded some of the limits of said format (nr of vertices, iirc). I will probably still complete it though but with that limitation in mind some animations can't be exported and also complex high poly animations can't be imported. Not until I work on another format...
It's weird Max failed to export the mtl. Can it be that the material name has some odd characters in them? Something is out of place...
[edit] You can also omit the Max mtl export (disable 'Create material library') if you save it to the same file, and do specify to 'use' an existing mtl. As long as the S3D mtl is still there you are good to go (hopefully
).