Hmmm... I've tried fiddling around with it, without any great success. Do you guys see anything wrong with the below code, or am I going to have to go back to my server with a hammer & chisel?
<?php
$photoImage = ImageCreateFromJPEG('background.jpg');
ImageAlphaBlending($photoImage, true);
$logoImage = ImageCreateFromPNG('over.png');
$logoW = ImageSX($logoImage);
$logoH = ImageSY($logoImage);
ImageCopy($photoImage, $logoImage, 0, 0, 0, 0, $logoW, $logoH);
Header('Content-Type: image/jpg');
ImageJPEG($photoImage);
?>