If you don't know what Black Sun is:
"You won't find this by looking at any track listing. Rather, it's the brief (1:04) instrumental opening to both the "Moscow Mix" and the "expanded single version" of "A Red Letter Day." Neil wrote this somewhat Debussy-ish piece of music back in 1989, but the Boys apparently didn't quite know what to do with it until they decided to let it serve as an introduction to these two versions of "A Red Letter Day." Neil concedes that it sounds rather threatening, which may account in part for the fact that they "buried it" in this way." - http://www.geowayne.com/psbhtml.htm
If you don't have the single or the Bilingual:FL album, you can listen to it on official site.
Anyway, what do you reckon the artwork for Concert will be like? Same style as Fundamenal or somthething different?