https://d2kplus.com/ normally has all the tools to edit Dune 2000, but I cannot find the Resource Editor that can extract the images from .R8 and .R16 files.
I attached the program below so you can get the images from Dune 2000.
For example open "data.r16" (from the folder Dune 2000\data\ ) with this program and you export all the images in that .r16 file (warning, that are a lot of images!).
Program was made by mvi who made more amazing modding tools.
Download: Dune 2000 Resource Editor.zip