After finally getting the classpath set correctly (I hope) I entered this line from 'http://lucene.apache.org/java/3_0_3/demo.html' in the cmd prompt:
java org.apache.lucene.demo.IndexFiles C:/Program Files/lucene3.0.3/src
I then get a message saying:
Document Directory 'C:/Program' does not exist or is not readable, please check the path.
How could this be?? PLEASE HELP!