OS X V10.7 Lion :: 10.7.4 Cannot Change Or Reset My Password

I initially tried the normal System Preferences/ Users and Groups approach, unlocked the window, entered my existing password, entered my new password twice...got this...obviously I have edited the image to remove my name...

Recovery mode using Lion results in a very similar message, a box pops up, etc. No go .So I try to reset the Admin password to have a new Admin login which results in the "starting a new machine" screens, etc., so I can then change MY password, etc using this... Boot single user and enter  rm /var/db/.AppleSetupDone But the system reports it cannot find the file or directory. So I login as Administrator (I have this password) and using the GUI, the option to change MY password is not showing. So I login as root (I also have this password) and using the GUI, again, there is no option to change MY password. As I upgraded/App Store via the network I do not have a disk to boot from.I do have Time Machine backups, so the notion of restoring Apps and personal files and folders after a complete reinstall is not that hideous, though I have better things to do like most of you. But really, isn't there a way for me to change my password using the GUI?

Info:MacBookPro, Mac OS X (10.7.4), cannot change my password, ever