If I get you right, you want something like about.com, where most of the external URL gets framed, with the About brand at top.
It is pretty straight forward
create a HTML frameset with 2 rows
the first row will contain you logo/brand file
the second row will contain the X URL
instead of having a static frame src in the second row, put <?echo $loadURL:?>
eg. <frame src="<?echo $loadURL;?>" ...
Now for all your links you will have your logo at top you simply use the url to you new frameset and add the loadURL parameter.
eg.
<a href="my_frameset.php?loadURL=http://domain.com">Hyperlink</a>
hope this will help you out.
regards Thomas A.