For the asterisk'd chords, I improvised on the G and Em7 chords, more or less. I what I've labeled Em7 is not really Em7, but we'll call it that just so we can call the chord Em7*....ok?....ok! When making the transition from the G --> G*, simply pull of on the B string, and when from Em7 --> Em7*, do the same. I like playing it slower than the original version, and below is the strumming pattern I works nicely...feel free to strum however you feel like strummin tho ;) For example, (guitartabs.cc)