cpp/drmexplore   - command line tool to look at DRM files
cpp/bigfuse      - mount BIGFILE.000 without unpacking it
tools/cdcunit.py - blender extension to load unit files
tools/cdcmesh.py - blender extension to load mesh files (required by cdcunit)
tools/drm.py     - python implementation of DRM reader (required by cdcunit and cdcmesh)

place the python scripts in ~/.config/blender/2.91/scripts/addons/ or equivalent