i forgot the password

I have a ibook g4 that i forgot the password on i followed the command s directions and the reboot. it reboots into setup were i have followed all the steps and completed. then a restart is required only evreytime it boots back up im forced to setup again. i was able to use my ibook before because it logged in at start up but i was able to upgrade or make any real changes because i couldnt remember password

so now im even farther from being able to use my ibook does anyone have a fix i do not have any disc so cant try that unless you coukd also provide a place to get it