Header of the Template

Hi, I was wondering if some one could help me, I am trying to disable that php function that calls on the Name of the Web Site, and place the name on the header, I want to use an image instead that display the Log and don't want the String of the Web Site name on top of it. Can some one Tell me where do I hide that or where is the code that is calling my website name to place it on the header?

Thanks

When you installed the component, modules were also installed. No code editing needed!
Upload your header image to: {{root}}templates/mobile_pda/resources/images/
Find module "Mobile Header Module" and adjust parameters to show image.
Then put your image address in "Header img URL" {{root}}templates/mobile_pda/resources/images/nameofyourheaderimage

What about the Iphone template? It still does not allow me to edit that one, i've tried to find a module for that and it does not work. Can you give me more tips. Thanks in advance.