Hi
try with in marketplace, release and upgrade info menu
on the lefthand pane SAP Business Suite Applications -> SAP ERP -> SAP ERP6.0 ->
SAP enhancement packages for SAP ERP 6.0 -> click on SAP enhancement package 6 for SAP ERP 6.0 and the click on ERP 6.0 EHP 6 Upgrade and Update Guides
Let me know if you have issues
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