Ubercart Customizations for Drupal Website

We need help with two items in our shopping cart 1) [login to view URL] [login to view URL] On the two urls above, we need to make sure these items are NOT charged shipping or tax, even when the products are mixed with regular gift shop inventory, which IS eligible for tax and shipping. Currently, when someone adds an item to the cart from the gift store along with a membership or donation, the membership and donation are getting taxed/shipping because the other gift shop products are eligible for shipping and tax. 2) When someone places an international order, we want to capture their information, but not charge their card. International shipping is unpredictable for our items, so we will want to inform them of the shipping cost before proceeding with the order. they will need a message stating that someone will contact them with shipping costs before processing their payment, and when should be alerted when an international order comes thru. The gift shop uses tax tables for each city in New York, so please be careful not to disturb this if and when customizations are necessary. Please only bid on this project unless you are certain on how to execute the solutions for these issues and have experience with implementing them.