Hi CiPHeR, thank you for the quick answer

I tried again and i dont get any errors during the upload and resize of a picture. And in the backend i can see the different sizes of the image. After i copy the resized images from the resize folder to the product folder they are also shown in the product detail page. But just in 90x90.
It might be helpfull If I post the code i add in the shop.product_details.php
/** PRODUCT IMAGE2 **/
$product_image_2 = "";
$full_image = $db_product->f("product_full_image");
$full_image = $product_parent_id!=0 && !$db_product->f("product_full_image") ?
$dbp->f("product_full_image") : $db_product->f("product_full_image"); // Change
$product_thumb_image_2 = $product_parent_id!=0 && !$db_product->f("product_thumb_image_2") ?
$dbp->f("product_thumb_image_2") : $db_product->f("product_thumb_image_2"); // Change
/* Wrap the Image into an URL when applicable */
if ( $db_product->f("product_url") ) {
$product_image_2 = "<a href=\"". $db_product->f("product_url")."\" title=\"".$product_name."\" target=\"_blank\">";
$product_image_2 .= $ps_product->image_tag($full_image, "alt=\"".$product_name."\"", 0);
$product_image_2 .= "</a>";
}
/* Show the Thumbnail with a Link to the full IMAGE */
elseif( !$db_product->f("product_url") ) {
if( empty($full_image ) ) {
$product_image_2 = "<img src=\"".IMAGEURL.NO_IMAGE."\" alt=\"".$product_name."\" border=\"0\" />";
}
else {
// file_exists doesn't work on remote files,
// so returns false on remote files
// This should fix the "Long Page generation bug"
if( file_exists( IMAGEPATH."product/$full_image" )) {
/* Get image width and height */
if( $image_info = @getimagesize(IMAGEPATH."product/$full_image") ) {
$width = $image_info[0] + 20;
$height = $image_info[1] + 20;
}
}
else {
$width = 640;
$height= 480;
}
if( stristr( $full_image, "http" ) ) {
$imageurl = $full_image;
}
else {
$imageurl = IMAGEURL."product/$full_image";
}
/* Build the "See Bigger Image" Link */
if( @$_REQUEST['output'] != "pdf" ) {
$link = $imageurl;
$text = $ps_product->image_tag($product_thumb_image_2, "alt=\"".$product_name."\"", 1)."<br/>".$VM_LANG->_PHPSHOP_FLYPAGE_ENLARGE_IMAGE;
// vmPopupLink can be found in: htmlTools.class.php
$product_image_2 = vmPopupLink( $link, $text, $width, $height );
}
else {
$product_image_2 = "<a href=\"$imageurl\" target=\"_blank\">".$ps_product->image_tag($product_thumb_image_2, "alt=\"".$product_name."\"", 1)."</a>";
}
}
}
$template = str_replace( "{product_image_2}", $product_image_2, $template );
It might be because i'm running it a local sever but it would be wierd if that is really the cause of my problems.
Anyway if you cannot think of a mistake i might did i guess i have to build a temporary joomla installation on my server (which takes forever

)