315873 magento - import oscommerce

Hello, We are in the process of moving our system from Oscommcerce to Magento. We have magento installed and now we need to import oscommerce data including usernames and encrypted passwords. We are just having trouble getting it to work so we are looking for some one with experience to tell us how to do it. (Maybe include an sql imported example or 2) We just need the Products, Orders, Customers, and Categories brought over. The osc database is has about 10,000 products so it is quite large. A job well done will lead to future larger projects! -Need someone reliable.