Most iTrack configuration is in the config.properties file. This includes datasource details and SMTP details for mailing.
iTrack uses the Displaytag and SpringLayout libraries and their configuration files are displaytag.properties & springLayoutConfig.properties respectively.
If you are building and deploying these files can be found in the src/main/resources folder or if you are using the pre-packaged war, they are deployed to the WEB-INF/classes folder. Please keep in mind that if you are using the pre-packaged war you will either need to explode the war, alter these files and then re-zip it or allow your web container to explode the war, remove the original war, alter the files and then restart your web container.