I want to secure some folders/directories on my website which is running under IIS6, but I don't want to enter the users in Active Directory or make them windows users in any way. I have the users/passwords in a database currently. In the past I had to purchase special ISAPI filters/applications in order to create password protected directories that could look up users/pass in DB or a flat-file (like an .htaccess type thing)... something like http://www.flicks.com/flicks/authx.htm or http://www.iistools.com/en/iispassword.html or http://www.dotnetprotect.com/
assuming I don't want to do any custom development... what are my options for making this work in IIS6? Are there any free/open-source options?