Recevier FTPS- Hierarchy & How Load trusted keys in keystore

Hi Experts,

Need your help for faster execution . We are stuck at one step :-

http://scn.sap.com/message/7146900#7146900

http://scn.sap.com/people/rajasekhar.reddy14/blog/2010/04/13/how-to-configure-ftps-in-file-adapter

We have IDOC to receiver FTPS scenario in PI 7.1
Port --11005

1. We have created  & Configured  PI Private key

    NWA – Configutation Management ---- Key Store – Service SSL

2. As per this PI Private Key , we “Generate CSR Request “  and sent to our client to get  trusted“ Client Public/Trusted Keys”.
     We got below trusted  keys from client.

          trusted -Leaf
          trusted -Root-CA
          trusted -Server-CA

3.    What will be the hierarchy or priority to load above keys.
        How to -- Load  trusted keys in  keystore

        Is this the option  -- >NWA – Configutation Management ---- Key Store – Service SSL  --- Import CSR Responses.

Kindly suggest !