Help Please

[fahl]

I need to make fluid header,Searc someone will say,Already have,totally lost me.
Have an excuse,recovering from heart problems so cant concentrate.

I have this in header

   <div class="headerrightl">
    <img src="images/twisteddark/misc/header_banner.jpg" /><img src="images/twisteddark/misc/header_banner_bg.gif." /><img src="images/twisteddark/misc/header_banner_right.gif" />
   </div>

And this in Header css

.headerrightl {
background: url(images/twisteddark/misc/headerrightlbg.gif) no-repeat top left;
height: 140px;
padding-left: 15px;
padding-top: 40px;
}

Thats as far as i can get
This is what i am trying to do,
insert header into black box part.



Thanx