Thanks for your reply, MrFixit.
The "repair job" you see is a professional plumber (from Jim Dandy Plumbing in the Seattle area) teeing of from my galvanized steel line so that I can feed my sprinkler system.
I'm open to educating myself on sweating copper, and at this point, it would help me if someone would walk me through the various fittings that I'll need to lay the new pipe from the starting point(
http://snice.net/pipe/startpoint.jpg) to the ending point (
http://snice.net/pipe/endpoint.jpg).
Thanks!