Actually, the top three lines of the plug-in needs to be this:
PHP Code:
$output = replacePngTags($output);
function replacePngTags($x,$img_path='http://yoursite.com/images/kirsch/',$sizeMeth='scale',$inScript=FALSE){
$arr2=array();
This is needed because certain modifications will not see the images folder correctly. So set the image location to
http://yoursite.com/images/kirsch/.