von server A wo dein script ist auf server B wo die bilder sind thumbs zu machen geht glaube ich nicht... und wenn wäre es wohl zimelich kompliziert....
wenn du die bilder hochlädst, würde ich eine batch date schreiben, die dein script lokal aufruft und danach kannste alles mit thumbs hochladen...
kannst lösung vll posten, interessiert bestimmt auch andere & die sind froh über die lösung ! 
Die Lösung ist recht umfangreich, aber wenn ihr wollt 
FTP Klasse
<?php
class ftp {
// Private Data
var $host = '';
var $user = '';
var $pass = '';
// Private Identifiers
var $conn = NULL;
var $login = NULL;
// Changes into the specified directory
function changeDirectory($dir){
if (@ftp_chdir($this->conn, $dir)){
return true;
}
else {
return false;
}
}
// This is the same as chmod
function changeMod($path, $file, $mode){
if (chmod($path.$file, $mode)){
return true;
}
else {
return false;
}
}
// In case php doesn't do it itself
function closeConnection(){
@ftp_close($this->conn);
}
// mkdir
function createDirectory($dir){
if (!file_exists($dir)){
if (ftp_mkdir($this->conn, $dir)){
return true;
}
else {
return false;
}
}
else {
return false;
}
}
//rmdir RECURSIVELY, means that directory does NOT have to be empty in order to get it to work :)
function deleteDirectory($dir){
if (!(@ftp_rmdir($this->conn, $dir) || @ftp_delete($this->conn, $dir))){
$list = @ftp_nlist($this->conn, $dir);
if (!empty($list)){
foreach($list as $value){
$this->deleteDirectory($value);
}
}
}
@ftp_rmdir($this->conn, $dir);
}
// Delete a File..
function deleteFile($file){
if (ftp_delete($this->conn, $file)){
return true;
}
else {
return false;
}
}
// Constructor which establishes a connection
function ftp($host, $user, $pass){
$this->setVars($host, $user, $pass);
$this->conn = ftp_connect($host);
$this->login = ftp_login($this->conn, $this->user, $this->pass);
}
// Get into the upper Directory
function moveUp(){
if (ftp_cdup($this->conn)){
return true;
}
else {
return false;
}
}
// It's better to let a function assign the variables
function setVars($host, $user, $pass){
$this->host = $host;
$this->user = $user;
$this->pass = $pass;
}
// Upload the File!
function upload($serverfile, $localfile, $mode = FTP_BINARY){
if (ftp_put($this->conn, $serverfile, $localfile, $mode)){
return true;
}
else {
return false;
}
}
}
?>Die Datei, die alles ausführt (oder zumindest der Teil davon)
/*
##### ADD SCREENSHOT #####
*/
if (isset($_POST['screenshot_create'])){
// Since the images are hosted on another Server, we have to establish a connection via FTP
$ftp = new ftp($var['ftp_dlhost'], $var['ftp_dluser'], $var['ftp_dlpass']);
// Directory for screenshots is html/images/screenshots
$ftp->changeDirectory('html');
$ftp->changeDirectory('images');
$ftp->changeDirectory('screenshots');
// If Directory with Gameid doesnt exist, we create it and move to it
if (!$ftp->changeDirectory($g)){
$ftp->createDirectory($g);
$ftp->changeDirectory($g);
}
$expl = explode('.', $_FILES['screenshot']['name']);
// Add Screenshot to Database
$games->createScreenshot($g, $expl[count($expl)-1]);
/*
The Method getScreenshotID returns the highest ScreenshotID + 1
But we have just added another Screenshot, therefore we have to do the -1
*/
$screenshotID = $games->getScreenshotID()-1;
if ($ftp->upload($screenshotID.'.'.$expl[count($expl)-1], $_FILES['screenshot']['tmp_name'])){
$ftp2 = new ftp($var['ftp_sitehost'], $var['ftp_siteuser'], $var['ftp_sitepass']);
if ($games->createScreenshotThumbnail($g, $screenshotID.'.'.$expl[count($expl)-1])){
$ftp2->changeDirectory('httpdocs');
$ftp2->changeDirectory('work');
$ftp2->changeDirectory('nextgen.at');
$ftp2->changeDirectory('temp');
$ftp2->changeDirectory('thumb_screenshots');
$ftp2->changeMod('../temp/thumb_screenshots/', 'thumb_'.$screenshotID.'.'.$expl[count($expl)-1], 0777);
if (!$ftp->changeDirectory('thumbs')){
$ftp->createDirectory('thumbs');
$ftp->changeDirectory('thumbs');
}
$ftp->upload('thumb_'.$screenshotID.'.'.$expl[count($expl)-1], '../temp/thumb_screenshots/thumb_'.$screenshotID.'.'.$expl[count($expl)-1], FTP_BINARY);
$ftp2->deleteFile('thumb_'.$screenshotID.'.'.$expl[count($expl)-1]);
$ftp->closeConnection();
unset($ftp);
unset($ftp2);
redirect('module.php?m=games&s=screenshots&g='.$g);
}
else {
action_fail($l['error_uploadfailed']);
}
}
else {
action_fail($l['error_uploadfailed']);
}
}
##### ADD SCREENSHOT END #####Der Teil der Klasse, in der die Thumbnailgenerierung erfolgt
<?php
class games {
// Stores the Screenshot Info in TBL_SCREENSHOTS
function createScreenshot($gid, $filetype){
global $ado;
$record = array('SID' => $this->getScreenshotID(),
'GID' => $gid,
'UID' => $_SESSION['uid'],
'added' => time(),
'filetype' => $filetype
);
$sql = $ado->AutoExecute(TBL_SCREENSHOTS, $record, 'INSERT');
if ($sql){
return true;
}
else {
global $l;
action_fail($l['error_badquery']);
return false;
}
}
// Copies and resizes a Screenshot to a Thumbnail
function createScreenshotThumbnail($gid, $file){
global $config, $var;
$filepath_temp = $var['url_website'].'/temp/thumb_screenshots/'.$gid;
$filepath_download = $var['path_downloads'].'/images/screenshots/'.$gid;
$size = getimagesize($filepath_download.'/'.$file);
$width = $size[0];
$height = $size[1];
$expl = explode('.', $file);
$extension = $expl[count($expl)-1];
switch ($size[2]){
// GIF
case 1:
$old = imagecreatefromgif($filepath_download.'/'.$file);
$new = imagecreate($config->data['gameScreenshotThumbWidth'], $config->data['gameScreenshotThumbHeight']);
imagecopyresized($new, $old, 0, 0, 0, 0, $config->data['gameScreenshotThumbWidth'], $config->data['gameScreenshotThumbHeight'], $width, $height);
imagegif($new, '../temp/thumb_screenshots/thumb_'.$file);
return true;
break;
// JPG
case 2:
$old = imagecreatefromjpeg($filepath_download.'/'.$file);
$new = imagecreate($config->data['gameScreenshotThumbWidth'], $config->data['gameScreenshotThumbHeight']);
imagecopyresized($new, $old, 0, 0, 0, 0, $config->data['gameScreenshotThumbWidth'], $config->data['gameScreenshotThumbHeight'], $width, $height);
imagejpeg($new, '../temp/thumb_screenshots/thumb_'.$file);
return true;
break;
// PNG
case 3:
$old = imagecreatefrompng($filepath_download.'/'.$file);
$new = imagecreate($config->data['gameScreenshotThumbWidth'], $config->data['gameScreenshotThumbHeight']);
imagecopyresized($new, $old, 0, 0, 0, 0, $config->data['gameScreenshotThumbWidth'], $config->data['gameScreenshotThumbHeight'], $width, $height);
imagepng($new, '../temp/thumb_screenshots/thumb_'.$file);
return true;
break;
}
}
}So, ich glaub das wars.