How to edit 404 Error Page?

[milksheikh]

I really need to know

 

[GSquadron]

http://codex.wordpress.org/Creating_an_Error_404_Page

 

[RH-Calvin]

You can check out for both HTML and CSS here:
http://codex.wordpress.org/Creating_an_Error_404_Page
http://www.htmlgoodies.com/beyond/refer ... r-Page.htm

And also how to set it up in a website:
http://www.thesitewizard.com/archive/custom404.shtml