Customise a Wordpress Template

I am trying to change a Wordpress Template and make it a working website. I have created a new Header (using Dreamweaver) and would like to change the Header on the template by replacing the OLD one with my NEW one. I would also like to delete 3 boxes underneath the Header which presently say "Offers of the Month" and turn that section into a MENU bar with buttons that will open up a new Wordpress Page. ## Deliverables Once the website is created I will probably need help with additional jobs. For instance I will have to create 2 Ebooks and will need help with Clickbank and autoresponder receipts and also customer service for any? software needs my customers might need help with.