Check out the link, some of the photographs look like they were taken inside the studio. I know U2 performed some of the songs inside as well in case they got rained off. Sorry if ya'll seen these already.
http://www.bbc.co.uk/totp/features/wallpaper/u2.shtml
http://www.bbc.co.uk/totp/features/wallpaper/u2.shtml