There is a plugin to import 3ds max scenes into A7. I am not sure if you can find one in the forums, just search for a method or plugin to import and export or for your case just import 3ds max meshes into WED. The problem your having im pretty sure is how high poly your model is.

- I still would recommend designing in MED it is very simple. I would say the hardest part of it all would be the UVW Map

-Wh1t3 W1d0w