Dynamic file name using without ESR Objects PI 7.3 SP5

Dear Experts,

I am working on one scenario where i need to just pick the file from client FTP using SFTP Adapter and post into our Target directory(ecc), scenario is SFTP to File scenario. (without ESR objects(No Mapping)), where i need to maintain file name as as it is from the directory(lets say my source file name will be GAD.CSV. the same name will be maintained at target i.e GAD.CSV). 

i have gone through some links on SDN

http://scn.sap.com/thread/1858693

http://scn.sap.com/thread/3170433

http://scn.sap.com/thread/3237414

Still having some doubts about configuration.

1) Do we need Server Finger print(SFTP Comm channel)?

2) what will be my Sender Comm channel configuration

3) Receiver Comm channel Configuration.

My PI Version is 7.3 SP.

Thnaks in Advance,

Pavan