Magento e-commerce tweak

Hello We are moving from a Miva Merchant 4.24 ecommerce solution to Magento. We have done most of the heavy lifting by creating the website with Magento and incorporating a template. However, in order to go live we need the following done 1. Upgrade Magento from 1.4.1.1 to the latest 2. Ensure that the multiwebsite feature is turned off and correct products are displayed. There should only be one set of products and ONE website only 3. Change base URL for admin to custome (for security) 4. Change the template's Login/Create an account title page's background color 5. minor changes to template (i.e. change Login link to logout once someone has logged in) 6. Minor fixes to checkout screen (Error pops out to review billing address) 7. General suggestions on category layout / setup Once this is done, we would like a template created for importing the products. Please provide your bids accordingly. Thank you