Custom 404 Not Found

[acmail]

Can anyone suggest the best way to create a custom 404 'page not found', or how to redirect 404's to an autonomous page (with the custom 404 content).

[datahell]

In Elxis 4.x create a 404.php file and place it inside your template's folder, that't all!
See 404.php on the system template as an example.