Hi..
There is no reason why photopost should retain the header when set to a blank within the 'global options' of photopost admin, i would also say that your existing header has a table with the background colour set to white which would produce the effect i'm seeing now.
also your stylesheet should contain :
Code:
Content visible to verified customers only.
quite obviously, maybe you could insert this css element within your header to, either way it is possible to remove the header from within photopost.
-T