Is there any easy way to restore a (leopard) system without the factory disk? If not, is it possible to manually go in and delete everything? If so, where would one find system preferences, key chain for pass codes, other sensitive information, etc?
Yes. Just delete the old user data when asked as you remove the account. Then go to your new account and start Disk Utility and do a secure erase of free space.Is it possible to do something like create a new User, switch that user to admin and then delete everything else?