This code will work if you're using S1, Generator, and a basic account (not sponsored!):
CODE
GLOBAL_HEAD<=
<style type="text/css">
table {
width: 400px;
}
table table {
width: 100%;
margin:0;
}
table table table {
width: 0;
}</style>
<=GLOBAL_HEAD
LASTN_WEBSITE<=
<img src="http://i31.tinypic.com/sw3iox.jpg" />
<=LASTN_WEBSITE
Change the "width: 400px;" part to be the same width as your header image. Then change the src="" to be the image URL that you're using. After that, the rest should be relatively easy. You may want to resize your image to be a bit smaller.
If you want to change your layout style to match this code, follow these links:
To switch to S1:
http://www.livejournal.com/customize/switch_system.bmlTo switch to a basic account:
http://www.livejournal.com/manage/payments/To switch to Generator:
http://www.livejournal.com/customize/s1/If you have a different kind of layout and don't want to switch, let me know and I'll see about helping you, but if you just want something basic this should work.