Site : http://sourcesense.github.com/jira-multi-level-cascade-select
5 seconds tutorial =
Welcome to Jira Multi level cascade select plug in !!!
Multi Level Cascade Select Plug in is a Plug In for the Atlassian Jira issue Tracker, that models a new custom field. The new custom field allows you to have a cascading select with a multi level selection.
If you are upgrading from versions < 2.4, you need to rebuild the JIRA index
== Sys admins ==
You maybe received the ${project.artifactId}-${project.version}-${config}.zip package,
please copy all the files under WEB-INF directory to ${ATLASSIAN_HOME}/WEB_INF/.
Simply extract the plug-in in the Jira Directory and the new Multi Level Cascading Select Custom Field will be added.