I just wanted to thank Mr. Tantrum for this guide. Although there are steps missing, it was still very helpful. I have 2 Pinsound boards and a Pinsound+. Installed my first Pinsound on CFTBL. Everything looked and sounded great until I hooked up new speakers and the stereo cable...resulting in no sound. I switched in the Pinsound+ board and still no sound. Out of desperation I did a firmware update on the Pinsound+ and now it works great. 90 songs from the 50s and 60s, and man do they sound incredible!
Hoping I can still get my 2 Pinsound boards to work in other machines with the stereo cable...