Sample prototyping schema for use with vanilla Apache Solr 1.4.1 download.
tar -xvzf ~/download/apache-solr-1.4.1.tgz
cd apache-solr-1.4.1/example/
vi solr/conf/schema.xml # edit into something like the schema here
java -jar start.jar # look for errors, otherwise have fun!
Start prototyping! To clean out the data index and start over, interrupt the Jetty server (Control-C) and:
rm -fr solr/data/
java -jar start.jar