[SOLVED] Atahualpa 3.5.3 and Dreamweaver CS5

Hi, I'm a newly registered donor/member and I was wondering if someone could please help me. I have cs5 and I'm using it to edit Atahualpa (by the way, what does that me?) but I'm having trouble changing the <div> tag image container file so that I can remove the gray border from my image and the bottom border, so that I can have my images height increased. Please forgive me if I'm not using the correct terminology I'm very new to all of this; wamp, index.php... I was also wondering if there was a tutorial showing exactly what all the different areas on a theme were, for instance; this is a header, footer, body of the image...that would really help. I did however find the line of code that I wanted to edit in DWs live code view but I could not edit it without disabling live view first but when I did that, the code disappeared. If I can't edit the theme in DW, is there any other way I could edit it, save the file, then load it up in DW and still have the changes that I made in effect?

Thank you in advance
BellaMary