...
WASCE 2.0.0.1 is based on Geronimo 2.0.3 which is a snapshot (, previous versions, and so far 2.1, don't work), I got it there http://people.apache.org/repo/m2-snapshot-repository/org/apache/geronimo/assemblies/geronimo-tomcat6-jee5/2.0.3-SNAPSHOT/geronimo-tomcat6-jee5-2.0.3-20080318.171132-2-bin.zip
To know more have a look at https://issues.apache.org/jira/browse/GERONIMO-3947, but Geronimo 2.1.1 is working.
The code and templates are in framework/appserver/wasce2. Of course, this works under Linux and Windows as well.
...