The EnergyXT2vst gives BB many Audio tracks, it makes it so easy to add extra midi/audio tracks into Biab,
you simply drag them into the vst window.
The tracks can be cut, copied, pasted, split, glued..
you can add vst fx to the tracks, mix them in the mixer.
These will then playback in sync with the main BB tracks.
You simply load the EnergyXTvst into the bb Audio track.
You can generate up a solo in BB then highlight the bars of the section you like and drag that section into one of the many audio tracks in the EnergyXTvst, you then regenerate the soloist track and copy any other section from the chord sheet.
http://www.energy-xt.com/download/26/energyXT26VST.zip