Very limited success...
The splash image did show up on the home page, but with the following problems:
--You saw the big image (no nav or anything) then offset to the right and below it you had the blog page (including appropriate header and nav).
--The blog page had an empty test post at the top -- the one I used to implement your technique.
--I input a new post and it bumped the splash image off the front page and I am back to the standard logo.
--I tried changing between static front page and blog front page but neither method had any effect after I added the new post.
I'm assuming part of the problem is because this was tied to a post, rather than a method of changing the header for just the front page.
Thanks for the effort, though.
I think I could manage to fix this if I understood where in the header.php it calls the image. I'm guessing the h1 or h2 statements in the head section, but I don't see anything like an img src statement that I would know how to change. I haven't yet found any relevant tutorials or posts that explain this. Everything related to new header images tells you to create new header phps but they don't tell you WHAT to change or add in the new php template that differs from the old one, and implements the call for a different image.
Can anyone explain this?