FBA for a Sharepoint site

http://msdn.microsoft.com/en-us/library/bb975136.aspx

http://www.devcow.com/blogs/jdattis/archive/2007/02/23/Office-SharePoint-Server-2007-Forms-Based-Authentication-FBA-Walkthrough-Part-1.aspx
http://avinashkt.blogspot.com/2009/08/configuring-forms-based-authentication.html
http://www.simple-talk.com/dotnet/windows-forms/configuring-forms-authentication-in-sharepoint-2007/

Active Directory for FBA in SharePoint using LDAP

http://www.codedigest.com/Articles/Sharepoint/94_Active_Directory_for_FBA_in_SharePoint_using_LDAP.aspx