What RealTrack guitar are you using ?
You can create any chord you like using midi with sforzando instruments from the PG music sfz library.
This one is matched to the sound of one of the RealTrack guitars so you can use F5 to mute the RealTrack then play your own midi or a modified RealChart midi.
https://www.dropbox.com/s/6krkobu3yb65wsr/RealTrack-ShinyGuitar.mp4?dl=0

https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=415151#Post415151