Module: http://litextension.com/shopping-cart-migration/interspire-to-magento.html If you are looking for quick, easy way to migrate data from your Interspire to Magento, LitExtension Migration Modules should draw your attention. It allows you to migrate products, categories, attributes, customers, password, orders and other data from Interspire to Magento. The process is straightforward and requires no technical knowledge.