FS9 / FSX possible issues while installing on Vista and Windows 7

Due to the big number of changes that the two operating system have implemented, especially in term of security and system folder structure here are a couple of tips to solve some of the issues you may encounter while installing Microsoft Flight Simulator on Windows Vista or 7.

fsx.cfg and fs9.cfg file location on Vista:
C:\users\(name)\Appdata\roaming\microsoft\fsx
C:\users\(name)\Appdata\roaming\microsoft\fs9

fsx.cfg and fs9.cfg file location on Windows 7
C:\users\(name)\Appdata\roaming\microsoft\fsx
C:\users\(name)\Appdata\roaming\microsoft\fs9

scenery.cfg on windows 7 has moved as well to:
C:\ProgramData\Microsoft\FSX
On fs9 scenery.cfg is located in flight simulator installation folder.

Problem: My settings are not saved after I leave flight simulator.
Solution1: Try running FSX / FS9 as an administrator (Right click on FS shortcut and choose Run as administrator)
Solution2: If above does not work give full control to the folder where fs9.cfg or fsx.cfg is located (see above folders depending on the system). To do this right click on the folder (e.g. C:\users\(name)\Appdata\roaming\microsoft\fs9) -> Proprieties -> Security (tab) -> Edit (button) -> Add > write "Everyone" and check all options including Full Control.

Problem: Cannot set antialiasing properly in FSX /FS9
Solution: Use nhancer. Full details here.

FS2004 and Nvidia anti aliasing issues - how to fix

If you get issues with FS2004 and antialiasing (split / duplicate image, no anti aliasing, black screen in screenshots) here is a fast way to fix it.

You will need to download and install Nhancer from http://www.nhancer.com/

Find MS Flight Simulator 2004 profile and press Duplicate to create a copy. The default one cannot be usually modified. Disable/delete the old one if needed.

Make sure fs9.exe is added under executable box for the profile you would like to have active.

Check "Profile can be activated manually".

On the right hand side, under "Enhancements", change to the desired settings.

Anti Aliasing ticked
Supersampling 4xs selected (Or more if your system acn handle)
"Enhance in game AA setting" - Unchecked
"Gamma Correction" - Checked
Anisotropic filtering 16x selected - Less if system cannot handle

Under optimization tab:

Texture filtering - high quality
Trilinear optimization - off
Aniso. sample optimization - off
Negative LOD bias - Clamp

Activate the profile in Nhancer before starting FS2004.

In FS following settings have to be made: Antialiasing - off and filtering to Trilinear.

This should solve most of the issues. If you make screenshots in the simulator using any program and they end up black please change the antialiasing seetting to 2x or any other value untill it works. Usualy on my system I have to also turn off supersampling sometimes to get rid of that.