How can i change a chord in a preset sound program?

Hi.

In Halion Sonic 2…
How can i change a chord in real time in a preset sound program?
This program just uses major chords… can i add a keyswitch to do minor/other chords programmed?

The sound in question is:

–> One Finger Muted Strumming 12 String (Guitar/Plucked)


Thanks in advance!