1. I can only speak on my own experience in setting up the ODI console, but my understanding is that the console is configured against a single master repository - the connection details are picked up when the WebLogic server starts. If I'm wrong, I'm sure one of the gurus will correct me.
2. I haven't come across a way to do this - I'm using 220.127.116.11. Aside from my initial go-live, I tend to only promote individual scenarios across environments. For the rare occasion when I need to do a larger bulk import I'll just use ODI Studio.