Short and sweet - just realized I don't already have this on here. This makes several assumptions in my environment, and you can modify as needed . Yes, it's ugly. Yes, security holes due to xp_cmdshell and the like. You've been warned.
Practically: you run this on the box that already has the repository. You tell it the name of the new server. It connects to that server, makes sure each side can reach the other, then enables Event Notifications on that new server. It ends by making a change, waiting several seconds, then selecting from your repository table. If it shows, you're golden. If not, time to roll up sleeves and figure it out.