Let me start by thanking all the people involved for this great product. I would like to find out how I can implement selective enabling of shipping modules depending on the product chosen. For example I may have 3 shipping methods at my disposal i.e 1.standard air 2. expedited air 3. surface. However some products may not be eligible for options 1,2 in which case I would like to present the user with only option 3 for such products. Any ideas how I can implement this? Cheers.