I don't have space to document the childish events surrounding the release of Commercial Zone (Wiki has info), it's easier to say that it's guitarist Keith Levene's alternative version of the This is What You Want... (1984) album. Five of the eight tracks appear on TiWYW, but with a distinctly different mix. CZ got a semi-official release in America, but it still sounds like a half-finished demo leak. PiL fans will want to track it down, but be prepared for it to split opinion and incite argument as to the legitimacy of inclusion in the band's official discography.
Songs of Note: ... (I'm not going to start that debate.)