I think there is .bvh import for milkshape also. Then you can export from milkshape to MED. Try that.

Med is also surpirsiningly resilient in solving orinetation conflicts. I searched for days trying to find a way to make all of my mocaps orient in the same direction because some mocaps were along the x axis, some along the -x, some along the z axis(etc). The neat thing about MED is that you can change the oreintations of each animation. Like if you have a "stand" mocap going in the x direction and you have a "walk" animation going in the z direction, and you were unable to resolve the issue in your modeling package(mine happens to be maya), MED is able to turn them in whichever direction.

MED's usefulness never ceases to amaze me.