If you have forgot your password, there is no need to reinstall the system. You can still recover the password by 2 ways.
- Login to single user mode and change it.
To login into single user mode. Boot into fedora 9, when blue scree appears, press E, Select your kernel and press enter. Add S or Single or 1 at the end of that line and press esc and then finally press B to boot. This will boot your computer in single user mode. You will get one prompt. There type
and change the password. Reboot.
- Rescue mode.