Amazon EC2 and S3 help

I am trying to move a project I have with a coder to EC2. However, he wants me to figure out EC2 and I'm having a hard time. I need someone to write a how to for me and him (i.e. screen caps and a little text) on... 1) what I need to provide him in terms of passcode and secret key (assume I am the owner of the EC2 account) a) how he logs into the account with the passcode and secret key b) how he creates an instance (micro instances) c) how he puts in place security groups/firewall d) how he upload/download files 2) what I need to do to start up a S3 account to host my files a) how I upload files from a mac to S3 -- is there mac freeware I can use?