modifying header images

2 header related questions Issue 1: my desire is to have the 'header media overlay' image only appear on the main page. when set it appears on all pages. Question: Can i disable the 'header media overlay' image on all page except the main page? Issue 2: i would like to have a custom header image on some pages - currently the 'Header Media' customization section only gives me a few options all of which deal with the header image. Question: how can i place a customized header image on specific pages? thank you