Complex sentence: The entire album was performed live at the 1998 Cornerstone Music Festival by a Ragamuffin Band, who then embarked on "The Homeless Man Tour" in support of the album.
Split into simpler sentences: The entire album was performed in concert by a Ragamuffin Band at the 1998 Cornerstone Music Festival. The Ragamuffins then embarked on "The Homeless Man Tour" in support of the album.