This guide assumes that you are running IDEA 7.x and that you have already installed and tested Tomcat 5.25 or greater.
Set up Tomcat as one of your application servers on this IDEA screen (Preferences -> IDE Settings -> Application Servers).
Add a new IDE configuration (Run -> Edit Configurations) called tomcat-crowd-webapp that uses the Tomcat application server added in the last step.
Click the Deploy tab. Select to deploy the crowd-webapp module. Once this is done, click the Configure button.
Select the Java EE Build Settings tab. Check Create web module exploded directory and Exclude from module content.