Is it possible to delete the orginal administrator of a Mac

Question

I bought a new iMac (17" Intel based) and set up a new administrator. I then realized I could migrate my info from Powerbook which went fine (via Firewire). Problem is I want to delete the administrator I sent up before I migrated my old info over. Please advise.
i Mac 17" Intel   Mac OS X (10.4.7)   iMac, PoerBook G4 and iBook. A real fan.

Answer 1

I know this is a very long posting – please be patient.
I need to clear a few things up here. I don't want to step on any toes and I respect different individuals expertise and advice – you clearly have been working on Unix longer than I have. It has only been 4 years for me (on and off). I stand corrected on everything I say.
1. Your comment was not untrue, just different to how it works on my OS version. I see that now.
2. When I said: "inaccurate advice does not help anyone", I was referring to my own previous posting. I meant that, if MY post had been unhelpful, it would not help anyone.
3. I was accessing this forum using my wife’s Mac. I still use the first release of Mac OS X (10.1) due to my hardware not being able to run the latest OS – She has the bear-share of everything it seems. That is married life for you. So, there are differences in the UNIX underpinning I guess, but some things should still be more-or-less the same.
Okay, I have managed to convince my wife to run a once-of experiment on her Mac (or Baby as she refers to it). I see that on this version (10.4.7) when you delete a user, unlike my version, you have the option to ‘Permanently remove a user’.
Confusion1:
My OS version differs because the deleted user (administrator) is only removed from the admin-level (1st level) and not the system-level (root-level) and the files of the deleted user, resides in a folder called ‘deleted users’ at root-level. I see you have this option as well on the latest version when NOT ‘permanently removing’ the user. The result is the same as my OS version. On my OS, that deleted user is not removed from the NetInfo database either and can only be removed by the ‘root’ (if activated) and the content of the deleted user is ‘reassigned’ to the current administrator (or a different one if it exists and is chosen).
Confusion2:
Now this is where my comment might seem confusing in respect to the “reassignment” process I mentioned. I say ‘reassigned’ because when a user is deleted from my system, an alert message pops up and reads: “This user will be deleted. The home folder of xxx will be reassigned to the administrator” Below is a list of Administrators on the system that you can choose from for reassignment. The files are now owned by the chosen Administrator. What is actually taking care of this process, I don’t know.
Confusion3:
According to a book co-written by two Unix bofs, D. Nolen, C. Pepper, (got rid of it 3 years ago) the deleted user can now be ‘re-activated’ by adding a new user, and then using the exact same user name, short name and password of the old account on the 'new' account. What results is an account with the previous access rights to the same files as before. The files in the ‘Home’ folder of the deleted user (/Deleted users) can now be copied directly to the ‘Home’ folder of the new account without needing to change ownership of the files.
On the new OS version, the ownership of the files now belongs to the ‘System’ and not the Administrator. You have to place all the files from the deleted user into the ‘Drop Box’ of the current Administrator to make it the ‘owner’ of the files. From there the files need to be placed into the ‘Drop Box’ of the newly created user, thus, passing over the Admin group privileges (read and write) of the files to the new user. My OS version differs here quite a bit – the above procedure is not necessary because the new user has the ‘original’ access privileges. This leads me to believe that the old user is not actually deleted for good on my version of Mac OS X. After all, the deleted user information is still in the NetInfo Manager until removed by the root account (well on my system). I used the term “masked” becuase it was the only descriptive word I could think of at the time – this is not a proper tech term. Sorry to cause alarm there. English is not my mother tongue.
In Spain we have a proper saying for this mistake: “You are the master of what you keep silent and the slave of what you announce”. I should try and upgrade my system one day – the problem is that they are so expensive compared to what we earn hear.