Dear,
For ESEP, yes you are right PAOC_ESEP_CORE is the package released from SAP, There you would have all the applications for Employee, Approver , Counseller , Adminstrator etc. As you are using HR Renewal 2.0 you should not face any problem.
For futher configuration please check
HCM E-Separation Configuration Guide
Best Regards,
Deepak.