You just have to keep in mind that you are not allowed to write to the \Program Files folders. So if you want to edit files there, start your editor with administrator rights (right click). If you want to extract files there, the easiest solution is to extract them to another folder like \temp and then copy them to \Program Files. Windows will ask you for administrator rights automatically.
An even easier solution would be - at least as long as the software developers don't adapt to the rules which are in effect for many years by now - to copy/install your whole game to a path outside of \Program Files
|