Ricardo....
To have changes of chords in a Intro or Endings, we need to select in midi file sequence, Program Changes with each chord sequence...
We need a Host like Cubase, and from Midi Editor we select any Chord Program Change, Start L.Guitar Sequence, Stop L.Guitar Sequence etc..
Is somewhat complicated this.... We need a familiarize with midi messages and sequences...
For example:

C Major == : P. Ch. 1
C# Major == : P. Ch. 2
C Minor == : P. Ch. 13

On the first tick of sequence the Channel 12 must be programmed a metaevent by typing the word ”KCHORDS”

For example:
1) First Tick 1.1.0 typing word(KCHORDS)
2) Second Tick 1.1.1 P. Change 1 (C Major)
3) Third Tick 1.1.2 P. Change 125 (Start)

The Stop Program Change is Number 126.

For more information please see the Style Compiler manual in Page 4...