Import product attributes/combinations only from magento to prestashop

Hi, I have magento site that has 6000 products and I need to get rid of magento. I have build a prestashop site and have imported all products, customers, orders, it is all ready to go live now. I only need you to link all correct product attributes to the existing products, as they are in magento. I have a plugin that suppose to do the trick and it imported all products, customers, orders and attributes, just haven't linked them to the products, so maybe you could go that way. Thanks Jonas