CS Cart Shopping Cart Programmer - display modifications

Description Please before bidding, I will ask to see references as i need someone that has past experience for CS Cart Shopping cart. The site is live now, and we not afford mistakes with my business. The store sells adult DVD products. Requirements: You need to know how to effectively make the required modifications, and your modifications should NOT affect the future updates of CS Cart!!! The solution should be an add on!! i repeat, so that updates wont cause problems and have no conflicts whatsoever!!! Modification Work required: 1- I have set up different prices for 3 different levels of registration. I used the usergroups and quantity price levels to set up levels for each group, (including clients who subscribe to a plan and are then automatically added to a certain user group). The idea is that by registering you get a discount on all store items, and then by buying a subscription/recurring plan you get a deeper discount. Such as: Retail Price $40 - Default/not registered (list price) Free Member Price $30 - (registered user usergroup) Premium Member Price $20 - Purchased recurring plan I have all that working ok, and the different prices show correctly everywhere during different states of registration/subscription. So we need simply this. We want to show all 3 price levels in the price box on both the product page and the catalog pages, so people know that deeper discounts are available if they buy a plan. (currently using a modified Electro template). We are lookingfor someone to do this bit of programming, so the display of the price levels appear in the price box, and dynamically modify when/if the prices change. 2 - Near the price block and main image on the item details page, we need an addon to show a small flash video for some products. 3- On the catalog pages that show the list of items, we want the "Short Description" field to be shown just above the "Add to cart" button. 4- "In Stock" field on Product detail page should be hidden, but still acrive so it affects inventory tracking correctly. Please provide sensible prices and don't be extreme as my changes are not that complicated, I just don't have the time to fix things and need someone reliable to help me out , and not break other things. Please provide to us some samples of your work in ecommerce area, especially CS-Cart.

We pay ONLY through PayPal. NO advance payments. Payment in full once the modifications have been up and tested with all common browser and without bugs. If this works out, we have future modifications needed and may want to build a working relationship, but this needs to be done first. Let me know if you have any questions.. Thank you!!