Try ConText you can get it over at Portedmods Its a pretty good editor.

On or about line 31 of themes/fiblack3d/header.html it should say something like this:

Code:

<td nowrap><div align="center"><font class="content">• &Home &• &Downloads &• &Your Account &• &Forums &•</font></div></td>

To add another link in there to admin add this after • :

Code:

&Admin Login

I'm not sure if the client one would need a full path or not as I don't use it.