How do I customize 404 Not Found messages?

[ssds]

I think I need to add some option to the .htaccess page. Is the file name included in there as well? Do I need to repeat it for all directories?

Thx.

[fcsnc]

There is a tutorial on this at:
http://powweb.com/support/404.html

[Ajarn]

I use this neat little program which tracks all of my 404 messages and lists each address which came back as a 404. It also allows you to have your own custom 404 page

It's called 'Cliff's 404 Finder' (free)
Here is the web site address:http://www.shavenferret.com/scripts/404/

After you've installed it, just change your htaccess file to read:

ErrorDocument 404 http://yoursite.com/cgi directory/404.cgi?404

Installation is very simple, and the program runs fast with very little strain on your server :-)