You r gonna need to provide more details about why and how you lost the password in the first place. We are not going to help if you didn't have access or if this is for illegal or immoral reasons.
it is a school network but all administrator accounts have been hacked into, I have already contacted the school and they say there is nothing they can do about it
they have not found the culprit yet
I have BIOS access
I have limited access to everything
I don't have access to any nodes
I don't have any access logs
and I have requested a map of the school network
Am I to assume that you are in the employment of the school? I'm still going to need more into here on what exactly happened and why you are trying to do this. It all sounds fishy still to me.