These files are often referred to by Doug Williams in exchanges in the Gasification mailing list and the Biomas mailing list to which he belongs. Doug is the Managing Director of Fluidyne Gasification.
All the files can be downloaded by right-clicking them and selecting "Save target as". The diagram files are in standard jpg and gif format, and the specifications are Adobe PDF files produced using OpenOffice.org
Doug can be contacted by email at this address. He usually checks the mail at least once per day.