Page Icons in Detailed Navigation

Hello,

I am displaying only pages in the detailed navigation, using NW 7.3 sp 8. Is it possible for each page to have its own icon? I want to replace the current bullet icon, and for each page to display a different image. I have found where to change the image in the theme editor, but was wondering if there was a way to change for each node that displays?

Thanks,

Heather