The IGUN question is easy to answer.  IGUN 88 (actually released in 1990) was a limited edition release on grey vinyl (and some black test-pressing knocking around).  As with most of the early (c. 1988-1990) KLF stuff it's not as polished as the final release.  The vocals on the 1990 release were provided by Pete Wylie, while Bill did them on the 1991 edit.  Also, I think some of the lyrics were slightly altered but I can't confirm that.
 
IGUN 91 was rumoured to be from the JAMs "Black Room" album although, as always, there's so much rumour/speculation/bootlegging that I think only B&J ever really new for sure...
-----Original Message-----
From: klf-bounces@mailman.xmission.com [mailto:klf-bounces@mailman.xmission.com] On Behalf Of Martin Bradbury
Sent: 30 August 2003 15:31
To: klf@mailman.xmission.com
Subject: [KLF] Its Grim Up North

Whats the difference between IGUN 88 and IGUN 91. I also read somewhere that IGUN 91 was taken from The Black Room but due to the lack of knowledge of the true contents of the BR i bet this bollocks. Ive found an mp3 on winmx claiming to be a live performance of America No More in Brighton sometime in 92. its the first ive heard of this so does anyone know anything.