I hope this helps..
Booting into single-user mode from LILO
Follow these steps to reset the password when using LILO:
* Reboot the system. When you see the LILO: prompt (see Fig. 1 below), type in linux single and press 'Enter'. This will log you in as root in single-user mode. If your system requires you to enter your root password to log in, then try linux init=/bin/bash instead.
* Once the system finishes booting, you will be logged in as root in single-user mode. Use passwd and choose a new password for root.
* Type reboot to reboot the system and then you can login with the new password you just selected.