using images as headings...

Often when I work on a site, I get a composite image handed to me by the 
client of how they would like the pages to look.  They often have big 
flashy text headings that I am unable to recreate in HTML/CSS so I need 
to use the image.

Is there any recommended/common way to conform to the practice of using 
<h1>'s, <h2>'s, etc... while using these big bloated images as headers?

Thanks,
Kevin