There is a half solution. You have to edit the file "*song name*.txt", which contains the chord and time information for a processed mp3, however this way the program won't play the chords.
You have to switch to see hidden files and find the following location:
C:\\\\Documents and Settings\\\\*User*\\\\Local Settings\\\\Temp\\\\*.txt
Here is an example for the file content:
{0, a}{10.62, f}{14.14, c#}{24.74, C}{28.26, e}{31.8, D#}{35.32, G}{38.84, d#}{42.38, a#}{45.9, E}{49.44, a}{52.98, e}{56.5, g}{60.04, d}{63.56, B}{67.1, E}{70.62, a}{91.8, f}{95.32, c}{105.92, B}
replaced with:
{0, 9m}{10.62, 5m}{14.14, 1m Hello! :)}{24.74, 0}{28.26, 4m}{31.8, 3M}{35.32, 7}{38.84, 3m}{42.38, Xm}{45.9, 4}{49.44, 9m}{52.98, 4m}{56.5, 7m}{60.04, 2m}{63.56, L}{67.1, 4}{70.62, 9m}{91.8, 5m}{95.32, 0m}{105.92, L}
So in my case the replacement is:
a, a#, b, c, c#, d, d#, e, f, f#, g, g#, A, A#, B, C, C#, D, D#, E, F, F#, G, G#
9m, Xm, Lm, 0m, 1m, 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9, X, L, 0, 1, 2, 3, 4, 5, 6, 7, 8