Here is How you can Add Custom Menu in Zee Auctions Script.
Its all about html and language variables. you need to edit the concerned template file located in themes/default folder.
for example header file to locate menu and add a new variable there with a link – See and copy from existing menu links.
This same language variable with a unique number with a phrase or work need to be added – copy same syntax php code as existing in file called messages.inc.php located in languages/EN folder.
Clear cache and refresh.