This page http://rmod.lille.inria.fr/web/pier/software/Fuel/Version1.9/Documentation/Installation has obsolete information, at least for Squeak installation.
This is because ConfigurationOfFuel-MaxLeske.178 still points to old repository http://ss3.gemstone.com/ss/Fuel.html which has been drained...
ConfigurationOfFuel-MartinDias.209 should be a better starting point.
But it's another problem, not related to documentationIn latest Squeak trunk there is another problem: lack of squeak4.5.x support both in ConfigurationOfFuel and MetacelloSqueakPlatform>>defaultPlatformAttributes.