I've managed to unlock one hidden soundtrack for PES 2017.
So you're now able to use 13 soundtracks instead of 12.
1. Put the file in .../Pro Evolution Soccer 2017/download
2. Add the "playlistunlock.cpk" to the DpFileList
Important: To use the added song, you have to start PES 2017 > Options > Soundtrack > scroll down the list and activate "Hidden Song 1".
mauri_d for the "CueName" and ID