File list (Check if you may need any files):
AulaChatRMI
...........\build
...........\.....\classes
...........\.....\.......\cliente
...........\.....\.......\.......\Cliente$1.class
...........\.....\.......\.......\Cliente$2.class
...........\.....\.......\.......\Cliente$3.class
...........\.....\.......\.......\Cliente$4.class
...........\.....\.......\.......\Cliente.class
...........\.....\.......\.......\Cliente.form
...........\.....\.......\servidor
...........\.....\.......\........\ChatImpl.class
...........\.....\.......\........\Servidor.class
...........\.....\.......\util
...........\.....\.......\....\CallbackImpl.class
...........\.....\.......\....\ICallback.class
...........\.....\.......\....\IChat.class
...........\.....\.......\....\Usuario.class
...........\build.xml
...........\lib
...........\...\CopyLibs
...........\...\........\org-netbeans-modules-java-j2seproject-copylibstask.jar
...........\...\nblibraries.properties
...........\manifest.mf
...........\nbproject
...........\.........\build-impl.xml
...........\.........\genfiles.properties
...........\.........\private
...........\.........\.......\config.properties
...........\.........\.......\private.properties
...........\.........\.......\private.xml
...........\.........\project.properties
...........\.........\project.xml
...........\src
...........\...\cliente
...........\...\.......\Cliente.form
...........\...\.......\Cliente.java
...........\...\servidor
...........\...\........\ChatImpl.java
...........\...\........\Servidor.java
...........\...\util
...........\...\....\CallbackImpl.java
...........\...\....\ICallback.java
...........\...\....\IChat.java
...........\...\....\Usuario.java