Need to set Cisco PIX 506e to Factory Default without knowing any passwords.

I have just been made responsible for our network security and have found that the previous person has not documented anything.  I need to reset a Cisco PIX 506e device to factory default, but I have no passwords and no information about its current config.  Once I have this unit configured I can then switch it out for an existing unit which I fear may be incorrectly configured.

Please can somebody help me desperately.
allenlillie32Asked:
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Alan Huseyin KayahanCommented:
      First, you have to clear the password of your PIX. For this process, you should enter the monitor mode by pressing ESC during the boot of PIX. You should use CLI (Command line interface) during the process.
     You can reach the CLI with a rollover cable that one end with RJ45 to PIX's console port and the other end serial 9 pin female to your COM1. Then a hyperterminal connection on this, will allow you to see CLI.
      In this process, we will send PIX the password reset file which will run automatically and ask you to reset password or not. But we have to determine the suitable password file fot your PIX. First, you have to determine whic IOS your PIX is running. Then you should download the related password reset file.
     And you need a tftp server, which is a small program that has the capability to send/receive files to/from IOS devices.
    Link below tells the procedure. Skip the "PIX with a floppy"  and read the rest
    http://www.cisco.com/warp/public/110/34.shtml

After resetting the password, enter the privillaged console bye typing enable, then press enter for blanked password. Then type config terminal for entering config mode, then type config factory for PIX to load factory defaults. Type wr mem to write the changes to memory and reload for PIX to restart itself.
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