First, thank you to Powerslave212 for making the awesome Superman Flying Mod Version 4! All credit goes to him.

Get it here: http://www.videogamemods.com/justcause2/mods/other/Parachute/Superman-Flying-Mod-Version-4/

You MUST have that mod installed first for this to work. This only tweaks a small settings file. You MUST have the Chaos Parachute DLC as well.

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I saw some people who downloaded Superman Flying v4 wanted to have Fast Flying for default. I never use slow flying either, so I edited Slow Flying to have as much speed as Fast Flying.

Installation instructions in the readme.