yes with my exporter you can export a model in blender directly to MDL7 file with vertex weights =) but at time its a beta. to time have the export in world position from blender a bug. all other funktions works fine.
to use in blender 2.78(newest version): select in blender you objects(only Mesh) and not more then 1 Armature then open the .py script in a blender text editor and press run. then you come to the export panel. make all your settings and export it =)