Cisco 803 TinyROM rommon password recovery/reset

Hi,

I am looking for some help with recovering or resetting the rommon password on a cisco 803 router. the router was donated to the college for use in lab work for CCNA students where i teach part time, no passwords where given to us and a password has been set in rom so we cannot use the normal enable password recovery proceedure. The college does not have Cisco support for this device so we are unable to get help from them. is there a proceedure to reset or recover the password? any help will be gratefully appreciated.