The Binary Installation of Sakai provides a shortcut for those that already have Tomcat in place and configured as needed, and it does so by providing a pre-built Sakai that can simply be dropped into Tomcat as an overlay.
All you need to do is unzip the Binary archive from within the top Tomcat directory (e.g. $CATALINA_HOME). The appropriate wars, jars, etc., will be deposited in the correct locations, as the structure of the archive maps to the file structure of Tomcat.
If you wish to configure your Sakai installation you'll still need to manually create a 'sakai' directory in $CATALINA_HOME to hold your *.properties files (i.e. the binary installation doesn't include this). On a Unix system, for example,
For more configuration information see the Source Install Guide.