Hey alsta,
You have the tenacity of a terrier! I like it.
Well, I did all that stuff, but got 4 setup warnings that were strangely familiar to me

from Utility:
- No DNS server
- No Router address
- Default password
- Unsecured wireless
The last 2 were because I opted to set up without security as suggested somewhere else in this giant post. That was OK.
Then I was able to complete the DNS but not the router address - I've long since forgotten where it lies. Utility didn't worry, but didn't cough up with a link either!
And another 45 mins of my life gone.
Add to those woes, Airport #1 went on the blink for some inexplicable reason probably connected with what I did, and I had to go right through the setup again. It's still not working. Another reset, sigh.
Sure, the fixit guys are going to duplicate our efforts, but at least there is a comprehensive paper trail on this thread that I'll refer them to first.