2 images, merge, make one transparent

Hi, I've looked here: http://download.php.net/manual/en/function.imagecolortransparent.p hp I've read this: http://www.wdvl.com/Authoring/Languages/PHP/BeginningPHP4/tra nsparent.html But they lose me when they suddenly jump to PNG. I got their code but it doesn't work for me. I have all the libraries, can do just about any image manipulation but this transparency thing has escaped me. Does anyone have a good tutorial on this that doesn't start with jpeg and images they shouldn't use. Peter --------------------------- "Reality is that which, when you stop believing in it, doesn't go away". -- Philip K. Dick