Markoz wrote on Nov 4^th, 2011 at 12:46am:

You need to edit the aircraft.cfg using administrative rights. Try this. Right Mouse Button click on Notepad. From the menu that comes up select "Run as administrator". Now click on File > Open then navigate to FSX\SimObjects\Airplanes\CS_B52 and open the aircraft.cfg. Make the changes needed and then save. Hope this helps

But now it has another message saying I have to put it in my documents.