Okay,
here is the link for that file...
Just to recap some other tweaks (I would recommend pasting all this in a text file so you have it).

Getting rid of the Fast Food
Heya HSV,
A common issue with FS 2004 are all of the restaurant signs clogging the memory (especially in urban areas).
This over a period of time can cause frame rates to drop.
Two things that you may do to avoid this:
1. In the main FS2004 folder you will find a subfolder called Autogen. In that folder there is a single file
named Default.xml . I renamed this file to default.BAK.
2. Find the line in the [Graphics] section of FS9.cfg file that reads TERRAIN_USE_VECTOR_OBJECTS=1 and change
the 1 to a 0 so that the new line reads TERRAIN_USE_VECTOR_OBJECTS=0 .
You'll be missing some fastfood restaurant signs, however, you should see both an end to the poor FPS when
returning to the airport to land and an increase in framerates when flying in the city.
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Removing default traffic.
All you have to do is remove the traficbgl file from the scenery/world/scenery folder and its gone.
You will find this file toward the bottom of the files
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Asynchronous strobes
heyhoh, folks, i got one, even found it on my own....
http://www.tradewind.org/TCA/files/asyncstr.zip ....puh, that was pretty exhausting....lol....