To make your own error pages download templates that are initally placed in the root of /public_html/ directory.
These are the files that you will need to edit. Simply FTP these down to your home computer and then edit them with a HTML editor.
The varibles that you can insert can be found in those above documents and also in the control panel. If you look in the custom error page part then you can view the codes.
Once edited, place them in the /cpanel3-skel/public_html/ directory. You can also include a holding page (call it index.html) like the one we use.
When you then create an account with Web host manager it will automatically put these files into the newly created accounts directory.