How do i use dex script?

[Modeler]

I have a copy of dex' script but its just text on a webpage that does nothing whatsoever how do i use it?Nvm i found out how but there another problem.
Gmaz refuses to open .mdl .mdx .max .anything actualy it will only open .gmax files as far as i know.
How do i get an mdl or mdx to gmax?

 

[Ryxian]

Where do i download the dex??? i need it... i know how to use it but i dont have it...where do i download that?