The steps for installation and upgrade will be the same.
1. You find the upgrade files for the integrated IGS version on the SAP Service Marketplace:
http://service.sap.com/swdc > Download > Support Packages and Patches > Entry by Application Group > SAP Frontend Components > SAP IGS > SAP IGS
2. Extract and copy the downloaded files to DIR_INSTANCE of your system.
3. The IGS version will be upgraded/installed once the system is restarted.
