In order to add additional information links to your products in DataPort the columns that you are looking for are called - InformationLink & Information -
You can check out more about how to do this here -
http://kb.monstercommerce.com/dataport/DataPort_Manual.docTo create the group of products that you are linking to, you can either create a new category that all of these products are also assigned to, or you can create a product group and associate products to it.