That's all in the template header. If you go to your style, and either go to "Common Templates" or "Edit Templates" you'll find the logo code.
As for a logo with text on it, you'd have to put your image in the background of a div or a table - and then put the text in the foreground. With 6 images, it's hard for any of us to know what the logo is supposed to look like or where the text is supposed to be. Either way, I count 8 images in the logo on that site.
I messed around with the exact div code your talking about once before only with images.
I was stuck for 15 hours, I need a code and not really information but thank you anyways.