Installation:
1st Close 3dsmax/gmax (if it's already running)
2nd Extract all the folders in your 3dsmax/gmax installation folder.
3rd Run 3dsmax/Gmax.
4th Go to Utility panel and hit Maxscript -> Run Script (or from top menu)
5th Select NeoDexInstaller and run it.
6th You should now have a new menu popping up called NeoDex. (Top right)

Note for GMAX:
Ever since 2.5 there's a weird bug happening (nothing to worry). 
The first time you run the installer it will throw an error. 
Just restart GMAX and run it again, if you did everything correctly, it should work now.

Installing Extra Plugins:
Since NeoDex 2.5. NeoDex supports user made plugins to be added to it.
Just copy the user plugin to Scripts\NeoDexExtraTools and run the NeoDex Installer.

Credits:
Author: BlinkBoy / Fernando A. Sahmkow

Contributers: Republicola (maker of old dexporter), Igni (Biped support and some fixes)

Beta Testers: Adiktuz, BallisticTerrain, Manoo, skrab, Talavaj