How do you set up OPB and OPBK and work with them?

If you mean just playing the song, you download the song and it’s recommended drum kit. Then, import the song and the drumkit using BB Manager and the File>import command. The file should then find the recommended drumkit, but, if not you would need to select the drumkit for the song in BB Manager. After that, it should be ready to play. Just press the main BB pedal and the song will start up.