Magento Customization

I am using Magento based multivendor system. Please read the requirements carefully and apply only if you are confident about the work. -> Filter search result by DELIVERY TYPE (Shipping method used- Table Rate Shipping and Flatrate Shipping): - Convert DELIVERY TYPE text field to dropdown in both methods - On search page in sidebar add pin-code search box and delivery type filter options -> Add the pin-code search box on product page to get quote on product page. -> Change the way the escrows are auto released (Just have to edit a public function of releasing escrow) -> Add 3 action buttons on order page in front-end- Release escrow action, change status and redirect button. -> When creditmemo is created- Release escrow, Refund money by points and pass 2 transaction in vendor account. -> RMA- Conversation related to RMA should be followed by email notification and fix 2 small bugs (Error on unavailability of product image and shows unnecessarily attachment symbol) -> Fix Onepage Checkout: Availability of carrier name on checkout page require a small fix to work with marketplace shipping. -> Restrict Vendor A to access the orders of Vendor B -> Send email to vendor for 2 statuses. -> Auto create- Invoice and Creditmemo.