"reset X form" is always a good thing to do in MAX before exporting (except if it's a camera), and so is collapsing the modifier stack (maybe not all the stack though, at least not the skinning modifiers)
some of the problems in your exported mesh could also be the result of double-sided materials not being exported to the X format, so check that your normals point out of the mesh and not inside.
as for the pandasoft options, i did a quick wiki page of the options that work for us. we use biped and fully skinned characters (we tested the "skin" and "physique modifiers, both worked), you can find it
hereedit: oops, didn't se that the person asking the question and the first one to answer were the same