Background Image Center (Please Help)

Im working on a friend’s dev theme he didnt have time to complete and I’m down to one final issue. Im needing the background image to be aligned top and center. Right now it aligns top (correctly) and repeats correctly but is aligned to the left instead of center. Ive tried all the resolutions I could find but am stumped. Any help would be greatly appreciated.

This is the code containing the bg image from my style.css

* { margin:0; padding:0; }
html, body { height: 100%; }
body { background:#000000 url('images/bg.jpg') repeat; font-family:  Helvetica,Arial, sans-serif; font-size: 14px; margin:0px; color:#6f6f6f; }
h1 { font-size: 18pt; font-family: Code-Pro-Demo; }
h2 { font-size: 14pt; font-family: Code-Pro-Demo; }
h3 { font-size: 10pt; font-family: Code-Pro-Demo; letter-spacing: 1px; }
h4 { font-size: 9pt; font-family: Code-Pro-Demo; }