Microsoft: Error message when you try to attach a file in a custom form on the Web site in Windows SharePoint Services 3.0: “This form was customized not working with attachement"
Blog: Custom listview with attachments
sharepoint designer hotfix
not sure if Office 2007 SP2 must contain that hotfix.
Understanding SharePoint’s “ddwrt:DataBind” syntax
Customise SharePoint List Forms
MSDN: List Forms
ListTemplates Elements (features schemas)
Tools for CAML intellisense: