Iphone App

I've edited some pages for my Iphone App In Photoshop over the last few days; they are pretty basic but I want the App to be simple anyway. It will have a front page that consists of text and a large lock which I will create in flash using an imported image of a lock and text created within photoshop first, and then it will have another page that links to different types of STI's, like this;

The pages with information with STI'S on will have text in the shape of a lock, and here's an example of what I intend them to look like;