Hi Matt,
Please check this and u can do all this in system tab then agent config.
https://www-secure.symantec.com/connect/forums/how-create-script-custom-file-type-detection-symatnec-data-loss-prevention-dlp
https://www-secure.symantec.com/connect/forums/dlp-agent-configuration
https://www-secure.symantec.com/connect/forums/how-skip-jar-monitoring-retain-zip-dlp-agent