Web designer and joomla developer

We require a few improvements to be made to our site which incidentally isnt yet live. We're using Joomla version 1.5.21. Summary of issues are as follow: 1. Redesign the home page to allow not just jpeg displays but videos and audios as well 2. Remove the addition of shipping costs for gift vouchers and coupons 3. Remove tax line from order information sent to customer 4. Correctly align the shipping page 5. When you change currency in shopping cart the user is taken back out to the filter page. It should remain on whatever page when the change is made 6. Ensure the ability to update/change currency at any page before payment is taken. Not sure this works as well as it should 7. Adding size chart to product pages