I am using Biab at a very basic level for practicing guitar and mandolin. I have downloaded numerous Biab music files or in some cases MIDI files and I have learned to apply styles and real tracks to them, and with that all is mostly well. The last step I would like to learn is this: Many of the songs I have include instrument parts that I don't want to use/hear. For example a number of bluegrass tracks I am practicing simply with a guitar and bass backing, but the song or style is applying drums and in some cases other instruments. I know I can mute everything but the instruments that I want to hear, but that means I have to tweak everything each time I load the song into Biab. What do I need to learn to edit so that I can permanently remove unwanted parts? Is this specific to the style? I am using a licensed version of BiaB 2008.5.

Any direction would be appreciated. Thanks!