http://wiki.cmsmadesimple.org/index.php/User_Handbook/Getting_Started/Editor/Add_Content

You can edit, delete and create new pages by logging in then going to ‘Content’ – then to ‘Pages’
*When you make a new page it will come up in your navigation bar automatically, unless you go to the Options tab and un-tick “Show in Menu”

 there is a little square image that you can click on that allow you to add images to the pages
*Click on the image then go to the tab called “Upload” then Browse, then send to server, then click ok, and your image should be in your pages

I am happy to answer any more questions you have