How to edit or modify Songs?

Meanwhile while you sort out an answer, here are some threads to get you going. One caveat though, trying to edit or modify beats or songs using the BeatBuddy Manager (BBM) MIDI Editor is probably not the best way to get work done for anything other than VERY light editing. A digital audio workstation (DAW) works best (Reaper, Logic Pro X, etc) but it comes at a pretty steep learning curve. There are several tutorials available from the forum to help you with both Reaper and Logic Pro X.