for those of you reading this thread
just in case no one has found this out yet
if you have multiple models in max each with there own
skin mod for example lets say i have a character and his clothes as seperate meshes both rigged to same body bones
export to fbx and import to med does not work!
you will only import 1 skined mesh and other mesh will not be skined (why this is i dont know however)
there is a fix

at http://www.unwrap3d.com
in the downloads section
there are plugins for max for u3d file format
install those plugins and export your model to u3d
then in unwrap (unwrap3d exports bones as meshes also as well as bones)
you select the model by selecting the materials
then select invert and click edit/delete
this removes the bone meshes
then export that to fbx and then it will import to med correctly
i have done this multiple times without any issues
if someone knows a better way please post it!
otherwise you can email me if you need help
or if i didnt explain something corectly
alienheretic@gmail.com