I had the same problem with fifthtexas and i used to do the workaround mentioned above.

But since you are using AutoCAD i found a tool named Plex.Earth which provides an evaluation version to download. This will be commercially available in a few days but you can have the full functionality until then to do your work. I think that you have to see it to believe it: i couldn't imagine that i would do the work i used to spend days in just some hours.

If you want to do the work using SU, the above procedure in SU PRO is the only affordable way. If you want to do the work inside AutoCAD take a look at Plex.Earth