Migrating Magento by hand? I know your pain! Its database is super complicated. When we moved our store last year, we had a hard time getting product details and categories to line up right with regular exports. So, we went with an automated tool - you can click here to see which one we went with. It took care of thousands of items and kept all our customer order info safe and sound without messing up the database. And it saved us from having to pay a pricey coder for a month to do it all by hand.