I do not export .X files from milkshape.
My experience is that when exporting .X files
milkshape screws upp the rotation and size
of the objects.
I loaded a wall from a .3ds file.
(that is correct in size and rotation)
Then i used that wall as a size and rotation
template for a new wall. When i saved the new
wall and then loaded the resulting file into
FPSC, milkshape had screwed up the position and
rotation of the model. Maby this has just
happened to me but it never worked. The
milkshape .x exporter is horrible.
(don't even get me started on the .x import tools)
i don't use milkshape any more. I use lightwave instead.
If i were to use milkshape i would save my models to
the .3ds format and then convert them using some other
application.
Sorry i could not be of any "REAL" help.