The model editor and Poly surfaces

[Statyk]

They are called PolySurfaces because that is the name of the mesh model made in programs such as Blender, Autodesk Maya, and 3DS Max. You can title meshes in modelling programs and that's why you're seeing "PolySurface", as it's the default name.

You can not 3D model in the ModelEditor. The ModelEditor is there to turn models (.dae) into usuable objects, puzzle objects, items, enemies, etc. Without them (.ent), a model is a static_object.

If you want to jump into modelling, you're going to need to install either Autodesk Maya 2011, 3DS Max, or Blender. I don't recommend Blender though, as it is freeware that often is hard to work with or causes model issues in rare cases. I recommend Maya 2011. I use it and it works with modelling, animating, and texturing. 3DS max can do just about the same but I hear its finnicky with animation exports.