Migration closed 1/2 way through now cannot access any admin privileges

Question

A little background I got my new imac to replace an older g4 ibook I did not however get to using the migration assistant tell 4 months after getting the imac.
when I ran the migration assistant it told me that the account that I wanted to move over had the same name as the account that is the admin account and asked if I waned to replace it and I selected yes. Now the bad part I did not tell my wife what I was doing and she came in half way into the migration and wanted to use the imac, she closed my ibook that was in the way and changed users.
Now on my imac my admin login is gone I can see that all the files have been moved into a Deleted Users folder under /users so I know all our family photos are there and save for now. I cannot however do anything on the computer, my login was the only admin account. I cannot use the install disk to reset the admin password, or use the disk utility. They both ask for an admin username and password, I have tried every password I have ever used but none of them work.
when I check the netInfo my account that was the admin account is gone from here as well
If anyone has any ideas please let me know.

Answer 1

JTolman wrote:
… but their usernames/passwords still do not work for anything else such as the disk utility or running the install disk.
What? This is very strange. I'd like to look at some of your netinfo database. These commands will not change anything. Log in as one of the accounts you just gave admin privileges to.
Open the Terminal (from /Applications/Utilities) and copy and paste the following into the Terminal window, one line at a time, with a return after each line:
id
nireport . /users uid gid name realname home | awk '$1>500 {print $0}'
nicl . read /groups/admin
nicl . read /users/`id -un`
ls -ln /Users
Copy and paste all of the output (include your commands) and post it here. You can edit out anything sensitive if you really must!
Also, unless it is obvious, tell me which was your original admin user (I would assume uid 501, but you never know )
EDIT I'm unlikely to get back to you today since it is now getting late here.
Message was edited by: Michael Conniff