If you need to add a copyright on the bottom of your MOSS Site pages, then you need to add this information to your Master Page. Now, I would suggest not to edit the default master page (Default.master), but copying it first like this:
Log on as a site collection administrator, and open the top site in a site collection
open the Master Page gallery: click site Actions -> Site Settings -> Modify all Site Settings, then click Master pages and page layouts
open an Explorer view of the library to make it easier to copy the origian Master Page: Click Actions -> Open with Windows Explorer
Right-Click on the Default.master fiel and select Copy, then right-click on any free space in the windo, right-click, and select Paste. Rename the copied file to DefaultWithCopyright.master.
Now apply this Master Page to SharePoint. Also apply the Master Page as a System Master page to ensure that the site has the same look and feel when opening non-publishing pages such as document libraries and lists:
go to the topsite, then click Site Actions -> Site Settings -> Modify all Site Settings.
click Master Page in the Look and Feel Gallery.
in the Site Master Page section, select your new Master page (DefaultWithCopyright.master). Then chekc the option Reset all subsites to inherit the Site Master Page setting
Now that you have copied and applied a new Master Page, you can start editing it to add the copyright statement as follows:
Locate the DefaultWithCopyright.master page file in the Master Pages and page layouts gallery, then use its quick menu to start editing the file in SharePoint Designer (accept the option to check out the file if asked)
Switch to code view, then search for the PlaceHolderMain. this is the place where SharePoint will later put the actual page content.
Add a new table row under the PlaceHolderMain segment; that is, add the last three lines in the code segment below:
<td class=’ms-bodyareaframe’ valign=”top” height=”100%”>
<asp:ContentPlaceHolder id=”PlaceHolderPageDescription” runat=”server”/>
<asp:ContentPlaceHolder id=”PlaceHolderMain” runat=”server”>
<td colspan=”2″>Copyright 2007 – My Company Name</td>
Save the Page, check it in, and approve it. open SharePoint site based on this Master page and check that the copyright statement is present now.