You can find all documents regarding your ECC 6 EhP 6 upgrade from following location:
www.service.sap.com/support > Release and Upgrade info > Installation and Upgrade guides > SAP Business suite applications > SAP ERP > SAP ERP 6.0 > SAP enhancement packs for ERP 6 > EHP 6 for SAP ERP 6.
There are separate documents for Media list and Upgrade guide, among many other.
-Roshan