I am in need of a good shopify developer to work on the following address:
We need the following completed:
Sorry to jump in your thread here, I just wanted to point out that some things in your list are simply not doable. Due to security and PCI compliance there is no mark-up or injection into page 1 or page 2 of your checkout. Any information you collect outside of what's available in these areas must happen on the cart page. The only thing that can be changed on the checkout pages is the look and feel through the use of a checkout.css file for some style over rides.
Thought I would throw that in there in case you needed to make some adjustments.