Put a Landing page for WP on a WS Site

Hi we have a wordpress site called [login to view URL] We need to add the landing page attached to the site like a landing page in WP I am not a WP expert but I see it has to be done via admin section and not direct with FTP We need to take attached zip and add the landing page designer made into our site similar to this page [login to view URL] We need based on your instructions a step by step to upload to the domain above what is in zip or the landing page person created (he send us more than just the landing page..we do not want any issue with current site) We want to add the landing page ASAP I need to follow your instructions and it has to work Also send us detail how to create the landing page directory folder like workers-compensation-attorney-lp7935 can be something similar all has to be done from WP see the zip with the new landing page: [login to view URL] wait from project post 10 min to download Thanks