Different menus

Hi all,

http://www.clients.huntshosting.co.uk/

As you can see my menu is a bit messy at the moment. But I'd like to have a logged in and out menu on the bar below the site's main menu

So maybe when logged out there's 'Order Now | Announcements | Pre-Sales Enquiries' etc and then when logged in 'Services | Tickets' and so on,..

How would I go about doing this?

Thanks in advance

Ryan