can't find upgrade master dvd for ERP 6.0 EHP4 !

Where can I find the upgrade master dvd for upgrade to ERP 6.0 EHP4 (windows/oracle) ? Does anybody knows the right materialnumber?

My collegues has copied the relevant dvds from sap upgrade dvd-package to disk and I don't find th "upgrade master dvd" with STARTUP.BAT.

I looked into download area service.sap.com/swdc:

My Company's Application Components->SAP ERP->SAP ERP ENHANCE PACKAGE-> EHP4 FOR SAP ERP 6.0 / NW7.01

but there are only upgrade export dvs, language dvd, etc, but NO Upgrade master dvd, too!!!

Kind Regards,

Uta