I tried AFCAD a very long time ago, I wanted to do my local airport and still do.

I had a look into gmax and creating scenery, but it is a lost cause to me. I understand how t crate the buildings, but not how to give them a location (longitude and latitude). Creating aircraft was my thing, but I'm not very good at doing that either. I understand what to do, but they never look right to me, so I now have half a dozen (maybe more) incomplete aircraft lying around on my HDD, gathering dust. :(