Are you trying to install these on the or Epic Games Store version?
Based on community guides for these specific delisted archives:
The "part4" designation indicates this is one piece of a multi-part compressed archive. To access the content, you generally need all parts (part1, part2, etc.) in the same folder. FUSER.ALL.DLC.part4.rar
You may need the Fuser Song Loader to make the game recognize these files in its current version. 🎵 Key DLC Highlights Included
Inside, you will typically find .pak and .sig files for individual songs. Are you trying to install these on the
Use a tool like 7-Zip or WinRAR to extract "part1.rar"; it will automatically pull data from part 4 and other segments.
These archives typically aim to complete the setlist, which originally featured: You may need the Fuser Song Loader to
While servers are down, these files allow the single-player and freestyle modes to remain fully featured. 🛠️ Common Usage & Installation