Flight Simulator 2004 feels comfortable if it resides on the root folder of your drive in a directory without "strange" characters like space.

To cut a long story short prefer to put it in "X:\FS9" or something like this. The same should be followed with FSX. C:\fsx is somewhat what is proposed.

Be carefull that some addons will look in the default "C:\Program Files\Microsoft Flight Simulator" path. Be sure to change the folder before installing the addon.

Attached to this article you can find:

-My personal FS9.CFG - Feel free to copy or study as you like

-Performance Guide for tweaking FS9.CFG parameters and what they mean.

-Performance Guide for tweaking FSX.cfg.  One of the best found over the net.

-Installation AND performance guide for FSX by famous NickN. At simforums: http://www.simforums.com/forums/forum_posts.asp?TID=29041

-Registry Fix utility which reports/set the FS2004 path in case that system registry is messed up or in case you transfer your fs2004 installation to a new computer. Found @ www.tweakfs.com

Attachments:

File	Description	File size	Last Modified
Personal FS9.CFG		16 Kb	05/07/09 14:34
FS2004 Registry key fix and viewer		759 Kb	05/07/09 14:40
FSXTweakGuide.pdf	FSX tuning Guide	176 Kb	01/08/09 06:44
FS2004 FS9.CFG Performance Tuning		181 Kb	05/07/09 14:31