ESS/MSS in ECC Ehp6/EP7.4

Hi All,

We are using EP server version 7.4 and ECC6 Ehp7

When I click on System->Status:

it is showing  version as  EHP7 for SAP ERP 6.0

When I see component information for SAP HR, it is showing as:

For SAP HR point of view, we are on EHP6 and SP91.

I previously worked in ECC6Ehp4/EP7.1 where all applications were webdynporo java.

But in EHP6 onwards, I heard, there are all Webdynpro ABAP applications. And we don’t want to use webdynpro java applications.

Now for ESS/MSS to work in EHP6/EP7.4,

1. what are all business packages need to be installed in SAP EP.
2. what additional components need to be installed in SAP ECC.
3. Where can I find the list of WDA applications related to ESS/MSS that are available in ECC.

Thanks in advance,

Madhu_1980