Oscommerce to Magento Migration

We need asap someone for the following job: Migration from modified OSCommerce to Magento 1.5. ## Deliverables The data to migrate: A. Customerdata: 1. All Customers with all their data (newsletter yes / no, addresses, birthdays, e-mail & passwords, ect.) 2. Their old orders with original order ids NOTE: We have an extension installed which allows to set our own style of order id's. This is important to us because of IRS, so we can set there the style of the order ids and the start of the order id number when going live. 3. The already exisiting coupon codes B. Productdata 1. All categories and products with their actual status (active / inactive) 2. Old Shop has two languages german / English - the products and category descriptions shall fit to the matching store view (german / English) 3. All products must be imported as grouped products with their options 4. If they have sample options (german: Abf?llung / Probeabf?llung) please use our custom "is sample product" attribute for that. 5. The manufacturers The Product in detail: ? The status active / inactive ? The stock amount ? The sku (be carfeull when importing and assign images to sku - there are a few that have the same sku - it is not every time unique!!) ? The manufacturer of the product ? The fitting Category ? Name of the product in german / English to matching store view ? The price ? As attribute: The "Incis" - Field (those are the ingredients for cosmetics products, most should have those a few have none) ? As attributes: Kopfnote (Headnote), Herznote (Heartnote) and Basisnote (Basenote) - These attributes are already setted in the shop ? The product description german / English ? The meta descriptions german / English ? The images: Every product has two images 1. Productimage -the small one 90 x90 (as THUMBNAIL if not autogenerated) and the Popup - Image 350 x 350 (as BASE AND SMALL IMAGE) ? Is product available for purchase with Google Checkout - Everytime to NO ? Every product which is imported as sample attribute has been fixed to maximum order amount of 1. So a sample can be ordered only 1 time on each order. ? Setting the tax class to "Versand mit Mehrwertsteuer" Before importing all products and categories in Magento have to be deleted.