HCI:Pre - Requisites For The SuccessFactors and SAP HCM Integration

Hi Experts,

i am new to the Hana Cloud Integration. i had a requirement to integrate the Success factors employee data with the SAP hcm system Using HCI(Hana Cloud Integration). What are the pre - requisites To do the integrate the employee data between SF EC and the Sap HCM system? As of my knowledge

i have listed some of the pre - requisites

1. On SAP HCM Side:

     Need to install the HCM Add - On's for the central component 6.0

     NetWeaver Release 7.00 SP27,

     NetWeaver Release 7.01 SP12

     NetWeaver Release 7.02 SP8

     NetWeaver Release 7.10 SP15

     NetWeaver Release 7.11 SP10

     NetWeaver Release 7.30 SP3

     NetWeaver Release 7.31 SP7

     NetWeaver Release 7.40 SP7

And Application Components:

SAP_APPL 600 SP15 or higher

Message based employee replication from Employee Central to SAP ERP HCM: PA_SE_IN 1002

On Successfactors side what are the pre - requisites i have to do ?

2. if we are having the webservices we have to activate those webservices and we can use the SOAP Adapter to communicate with the HCM System. if we are not having the webservices then how can i integrate with sap?Do i need to go for the file adapter option?

Please Suggest me that the configuration settings from each aspect like HCM ,SF & HCI.

Regards

Giridhar.