Prestashop Customization Needed

I have a prestashop [login to view URL] the attached [login to view URL] are two images [login to view URL] will show the current page, the other will show how the page looks like after the changes are made. I want to make the below changes 1) at the top, there is currently a menu "Sign In" . I want to add 2 more menu links here, "Register" and "Helpdesk".I will tell you the links later 2) see the part "buyer instruction" . I want this part look like the attached image . It is a text field added from product page on customizatin tab. 3) 4 featured products just like from homepage. i need to show the review if any product review . The text "Featured products" need to be changed to "Customers who bought this item also bought" 4) from quick-order page, remove the row "shipping" , total (below shipping) and "Tax" 5) see the part "review" . I want to show it like the attached image. 6) my shop use 2checkout as payment method.I installed it already and it performs the checkout work [login to view URL] after successful payment, i want the customer will be redirected to the "order history page"([login to view URL]) of their [login to view URL] right now, it redirects to a 404 not found page after completing the payment 7) from the "Order history" page, i want to remove the row "Carrier" and "Items (tax excl.)" , "Items (tax incl.) " and "Shipping and handling (tax incl.) " 8) there are much unnecessary space between the parts like between "more into" and review etc. see the attached image, i try to remove those space to look it short and simple