both is possible for backgroun image (with & without) 🙂
and for the theme, I’ve just changing the 5 lines code you modified in the header.php but it’s not working, so I upload all the theme and it’s good,
(but I’ve to change 2 or 3 things i’ve been change but it’s working, so it’s good thx 🙂 )
and for you, if you don’t know the “Notify me of follow-up replies via email” of the support is not working, we not receiving any mail when you replies