Complex sentence: The original issue was as a long cardboard-box, containing three CDs (each within its own jewel-case, with inserts) and a detailed booklet, which detailed the tracks and had comments from the band members.
Split into simpler sentences: The original issue was as a long cardboard-box, containing three CDs (each within its own jewel-case, with inserts) and a detailed booklet. This latter detailed the tracks and had comments from the band members.