Transfer Magento Dev Site to Main Site without affecting some things listed

Hi, we have set up our new theme on our dev site and now need to transfer across to the main site. Issue is we have a few things we need intact from the mainsite - this includes: - Customers - Request4quote quotes - New products we've added, categories and order of products in each catagory (they are numbered) What do you suppose the best way to do this is, we're hoping to get this done today.