More here might help http://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=399465#Post399465

If you use the RealChart of the piano, these are recorded on a Yamaha Acoustic/Midi piano, you will get the midi that you can manually edit the held chord to make it longer.

You can Drag the Piano track to DROP MID, drag it to a folder,
BB > File > Import Melody from MIDI file, you can mute the RealTrack piano, if you click the piano roll icon and select the M or piano button you will see the held chord, highlight that chord with the mouse, then hold Shift and drag the red notes to make them longer, I hope I have confused you enough.