How can I access windows xp professional when the administrator
password has been disabled, and there aren't any other users on this
computer?  I have recieved info on retrieving "forgotten password" but
that doesn't help me. At this point all I can access is bios at start
up by pressing f2.

I recently read an article which describes multiple solutions for your
dilemma. The article can be found here:

http://www.petri.co.il/forgot_administrator_password.htm

Out of this list, I have previously used John the Ripper, just for
fun, but if you just need to make a bootable cd to change the
Administrator password, there are many utilities reviewed which can do
that for you.

Thank you for your question!

skermit-ga

I find SAMInside is a great tool to use.  All you need a bootable CD
or floppy disk set for Windows XP.  Just copy the SAM and SYSTEM
file(with no extensions) from C:\windows\system32\config\. And
transfer it to another working computer and let SAMInsider do the
rest.  SAMInside DEMO( which is free) wil read out the last 2 to 4
digits of your password and Burtal-Force the rest of it.  It will take
you 2 hr at max if you computer is not too slow and your password is
within 12 digits.