The images were taken from various sources including:

http://godzilla.EECS.Berkeley.EDU:80/os2/gallery/textures/
http://the-tech.mit.edu/cgi-bin/KPT_bgs.pl
http://home.netscape.com/home/bg/backgrounds.html
http://src.doc.ic.ac.uk/computing/systems/ibmpc/windows3/desktop/winwall1.zip
http://src.doc.ic.ac.uk/computing/systems/os2/multimed/bmp/amybmp.zip
http://www.europa.com/~yyz/textures/textures.html
ftp://avalon.vislab.navy.mil/pub/textures/tif/tiles/