Version of ESS MSS?

Hi

What version of ESS and MSS should I install to use more Java Webdynpro based ESS MSS Application?

I am on below versions-

EP - 7.3

ECC - 6.0

SAP_HR - 600

I am interested in implementing below applications

New Hire – This is available in which business package - ABAP/ JAVA?

Address– This is available in which business package - ABAP/ JAVA?

Pay Change – This is available in which business package - ABAP/ JAVA?

Work Opportunity Tax Credit - WOTC – This is available in which business package - ABAP/ JAVA

Thanks

VD