I have some web development questions

[riddlebox]

Can anyone help me? A friend asked me if I could do a simple site for his boss, and I have little web building experience. I told him that I can do a basic site and that was it, his boss said ok. Well I have created the site, and now his boss would like some things done like a banner made for the site, and also he wants to take a picture that he has and make a background for the site from it. I am not sure how to do any of that. The site that I made for him is http://www.zexpressbusandlimo.com, if anyone could help me get these things figured out it will get the guy off of my back. Thanks