Yet another Win 8.1 post

I can see a need for a decent sticky about how to get Windows 8 or 8.1 to cooperate with us flight sim people. As long as we use MS Windows, at some point in time we are going to have to move to the OS that MS will 'allow' us. As I posted in another topic, I've got FSX running and my controller running quite nicely on 8.1. When I try to get my landing lights back to the way they appear in the sig below, I have to download the Sirocco GTX. (Necessary file for the change). Now I'm up against UAC as it won't give me permission to download into C/86 where FSX was installed. So.. I should have installed FSX into drive D, but, I didn't. Turning UAC off in 8.1 is slightly different than Win 7. Win 8.1 has a metro page and disabling UAC also disables Metro page. So now I am trying to figure out how and where to give the file permission to download to sim objects/ airplanes. If you have any suggestions I would love to hear. Or should I just reinstall to drive D and hope permissions disappear? 
