Download Netweaver 7.4 Media or SAP ERP 6 with EHP7

Dear Experts,

I am confused about download SAP Media Netweaver 7.4 , what can I dowload from sap Portal

My Company's Application Components" My Company's Software"SAP ERP"SAP ERP ENHANCE PACKAGE"EHP7 FOR SAP ERP 6.0

Or

SAP NetWeaver and complementary products"SAP NetWeaver"SAP NETWEAVER 7.4

and also I can not see IM ( Installation master in both ( Netweaver 7.4 and SAP ERP EHP7 ), 

• SOFTWARE PROVISIONING MGR 1.0   replacement of Installation Master

and  what is the difference when I SAP installation start with Netweaver 7.4  and SAP ERP EHP7

Regards