SFTP Questions

All,
I have reviewed Scott Klements' presentation on SFTP, but still have some
questions.
The system will be acting as a Client for this purpose and sending a set of
files to the server.

I will have a CL program that will drive all processing.
The process will run in the batch.

1. When I get the public key from the server, what do I do to install it?
2. I will be sending multiple files to the server and would like to
automate the process. What is the best way to do this?
3. The member name of the files being sent will vary with each
transmission. How can I do this in an automated envrionment?
4. Does it matter what user profile runs the job?
5. What OS Level security restrictions are there on using the required
commands?
6. If the client has a firewall that restricts outbound transmissions to
known ports, what ports need to be opened for SFTP?

Thanks,

Jeff Young
Sr. Programmer Analyst