With the release of the Steam version of the Beta, it seems Level-5 made some changes, if you are trying to load the ripped textures from that version, it might not work, if I ever get the chance I'll update the script but for now I'm sorry for the inconvinience
Noesis Script to load g4md and g4pkm files.
Download Noesis here
Place the noesis script on plugins/python
For this to work you need the model, mesh and texture file in the same folder and all should have the same name
Example of how your folder should look like:
Once you open Noesis on your folder open the g4md or g4pkm file and you should have the following results: