way to go, idaho. just kidding. at least you didn't delete the accounts. you can recover don't worry. even if you deleted them i think.
it will be ok and you will know a whole more more pretty soon.
just getted logged in there, you will feel better nd be able to fix...in the 'old days' i would have recommend a 'rescue' or 'parallel' install of win2k3 but i bet you don't need it. i found this:
you are allowed to login locally in Safe mode on win2k3 with administrator account even if you disabled it. then you can start fixing things up.
see this for more:
How to access the computer after you disable the administrator account
http://support.microsoft.com/kb/814777/en-us
final 2 cetns is: this perfect to get to know MS aupport. you might even get free support but even if not it'll be worth the money. keep the humble attitude and go slow and take the time to get what they are telling you...
Good luck, keep us posted. you will live thru it...