The above tool will just be a poor l0phtcrack clone. The problem is you cannot crack the admin password without logging into an admin account - no software running as a standard user can access the SAM file.
You need to figure out a way to get rid of the c:\windows\SAM file. If you delete it, you can log in with a blank admin password. The problem is you can't delete it from inside windows, so you need some method of booting from a CD/floppy boot disk
You said you can't boot from a CD. Do you mean that the laptop doesn't have a CD drive, or that it won't boot from it. Many laptops don't boot from CDs by default, but it's possible to manually tell it to do so. On mine (Thinkpad) you need to press F12 in the first few seconds after poweron, and you get a menu asking you to select a temporary boot device.