: Use a tool like 7-Zip or WinRAR with the "Extract Here (Smart)" option. This helps detect whether the files are loose or organized within a top-level folder, which is crucial for the game to recognize the noteskin directory.
: Modern StepMania versions use a Lua-based system that is far more advanced than older engines. If the 3940.rar file lacks modern .lua metrics, you must convert the older metrics and sprite offsets to the new system to ensure the arrows align and animate correctly. 3940.rar
Important notice. The present document can be downloaded from: http://www.etsi.org/standards-search. any reason to prefer WinRAR/WinZIP to 7-Zip? - Windows : Use a tool like 7-Zip or WinRAR
To "make a proper feature" or fix issues with such a file, you generally need to address the compatibility between legacy systems and newer versions: If the 3940