I have imported most of my data from Oscommerce to Magento from using Magento's Oscommerce Import Tool. Only thing it didn't successfully import all my categories and images. I think the reason they didn't get automatically imported is due Oscommerce contributes that allow multiple images and categories installed on Oscommerce. So for all my aprrx 300 products they have only 1 image and 1 category brought over from Oscommerce. I need someone to import the rest.