These are needed in order to obtain good results of partial evaluation. The section is partly Similix-specific, but parts of it are of more general interest. This distribution should immediately enable you to run Similix on Scm and on Chez Scheme. Chez Scheme is a commercial system distributed by Cadence Research Systems. To port Similix, all you you need to do is to change this system dependent part.
Scheme starts in the current directory.
IEEE Standard for the Scheme Programming Language, May 1990, IEEE Std 1178-1990. To decode the file Similix.tar.