If you come across a CDG+MP3 file claiming to be a Chessman production, look for:
If you stumble upon a similar 7GB folder of .MP3+.CDG pairs, you cannot just drag them into iTunes. You need specific software:
Most music, including the instrumental tracks used for karaoke, is protected by copyright. The legal way to build a karaoke library is to like Karaoke Version or the commercial libraries used by professional KJs.
Scan the files using automated tools to remove identical track variants from different manufacturers, saving valuable hard drive space.