Unlike the base game which stores data in the /base folder, RoE files are typically located in the /d3xp subdirectory of your installation .
If you're looking to hot download or inspect the PK4 files from Doom 3: Resurrection of Evil, here are some general insights: doom 3 resurrection of evil pk4 files hot download
However, the "hot" trend is risky. Instead of hunting for random file hosting sites, buy Resurrection of Evil on sale for $2.49 on GOG (which comes DRM-free with all PK4 files ready to copy). Then, use those PK4 files to mod, texture pack, and VR-mod the game to your heart's content. Unlike the base game which stores data in