I don't know PHP

I spent a good amount of time today trying to figure out how to add a banner to a web page. I only know html, but this website was done completely in php. It just seemed very foreign and complicated. I was on the server and the admin panel going back and forth on the index page and the administration and thinking how I was going to add something to it without messing up the whole structure. Arrgh! Usually I could depend on Dave to show me the ropes, but he was busy today. I went to the Oscommerce community forum. I googled several different phrases. I would read them word by word and still feel confused and overwhelmed. In the end I decided to add a simple pop-up window instead as a temporary solution. When I go into the office tomorrow I will open the page in Dreamweaver and see if I can view the layout better and modify it. Steve and Sandy both said that should do the trick. I hope so. I am just easily intimidated by any computer programming and coding. Let's see how I do tomorrow.