Question : Problem: how wipe and installl an new cisco iso

whats the best way to do a clean install on a cisco vpn 3000

Answer : Problem: how wipe and installl an new cisco iso

Please look at the link below from cisco website:
http://www.cisco.com/warp/public/471/vpn_3000_faq.shtml#software

I have copied and pasted the FAQ below:

Q. How can I set the VPN Concentrator back to factory defaults?

    A. From the File Management screen, delete the "config" file and reboot. If this file is deleted accidentally, a backup copy, "config.bak" is kept.

Thank you.