The CDLC mod only works with a legitimate, updated Steam version of the game. It does not work with old cracked EXEs because the song format changed after the Remastered update.

The RSMods Installer is the cleanest and most stable solution for the PC version. It utilizes hidden Direct Connect functionality originally written by the developers.

Originally, custom songs required you to own the song "Cherub Rock" by The Smashing Pumpkins. If you cannot purchase it due to the game's delisting, you can use these alternatives: AppID Change

If you are struggling with a physical copy that won't launch, the best "fix" is to wait for a Steam sale and pick up the digital version for a few dollars. It removes the need for a disc entirely, includes the "Remastered" stability updates, and is fully compatible with the Real Tone Cable and modern Windows 10/11 drivers.