Let's start completely over... Delete everything Feral Heart related. Download the lastest setup (again, I'm sorry) and the latest patch. (I know it says you don't need it, but just precautions).
This should take us back to the rendering problem again... Like the terrains being messed up. When installing, have absolutely NOTHING else up. It may be interfering with the install...
You're no bother, I have to go to work in about fifteen minutes though, so I won't be able to help you again till later. Maybe someone who actually knows what the heck they're talking about can help you. Though I'll continue to try and assist.