"Access Denied" when try to modify Google Earth Flight Sim F-16 parameter file

Hello,

I found a YouTube video with instructions re how to modify the Max velocity (x 10 apparently) for the F-16 in Google Earth's Flight Simulator. The video is located here:

    http://www.youtube.com/watch?v=n1ZRMJAY9nM 

The video said to go to the following directory:

    C:\Program Files\Google\Google Earth\res\flightsim\aircraft

and open the file "f16.acf" with Notepad. The the posting date for the video is 2008 and I am running Windows 7 (and Google Earth 7.1.1.1871) so I assume that time difference explains the slight difference in my directory:

    C:\Program Files (x86)\Google\Google Earth\client\res\flightsim\aircraft\f16.acf

The steps in the video are straightforward and involve changing four parameters:

    V_approach = 130    —>    change to 400
    V_cruise = 330    —>    change to 1000
    P_max = 130e7    —>    change to 60e9
    F_max = 130e3    —>    change to 200e5

After making the changes, the next step was to save the file as a replacement for f16.acf in the original directory. At first, I inadvertently attempted to save it as a .txt file and got an alert saying "Access Denied". However, even when I tried saving it in several different ways, eg:

    • Save as type: All Files
    • f16.acf
    • C:\Program Files (x86)\Google\Google Earth\client\res\flightsim\aircraft\f16.acf

I always ended up with the "Access Denied" notice.

I saw nothing in the video mentioning this obstacle so if someone could explain how to get past it, I would appreciate it.

Thanks