Connect to Amazon EC2 Instance from Nautilus without Using Password File

Lately, I have been working frequently with a couple EC2 instances. Remote editing on these instances has become a day-to-day task for me. These instances are based on Amazon Linux. I am so used to the "Ubuntu" way of remote editing, which I have described here. With EC2 instances, however, this method seems to be impossible -- as I need to supply the key file when mounting the remote location via SSH.
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