How do I by pass passwords OS9?

[glosterseagul]

Computer: iMac tangerine
Running OS 9.2

I Start the computer there are three users. Passwords were set by the kids they now can't remember them.

I tried to turn off extensions - didn't allow to switch of the user extensions. Any ideas or is this a start again job. No system disc or I could start up from the cd.

 

[applemacdude]

You need to boot from the cd and erase all the Multi-User Preferences