reperire ID ancora non generato

[rocco.mod]

salve ragazzi scrivo questo trehad per chiedere consigli , vi spiego come riesco ! inserisco nel database il titolo nel post , e in un altra query inserisco il contenuto , automaticamente la prima query genera un id dove andrà inserito il contenuto ...... adesso inserisco da una popup il files e dovrei generare l id del contenuto solo che non riesco a pensare una soluzuine :

function AddNewThread($forumid,$title,$opened,$status,$levelforum,$displayorder,$urlredirect,$enabledbbc,$enabledsmiles,$enabledsignature ,$forumtext)
{
  global $dbcore,$RCW ;

     $result = $dbcore->query("INSERT INTO `forumpost` (`forumpostid`,`forumid`,`title`,`description`,`dateadd`,`dateedit`,`userid`,`opened`,`status`,`view` ,`countreplay`,`levelforum`,`displayorder`,`urlredirect`,`enabledbbc`,`enabledsmiles`,`enabledsignature` )VALUES( 
     NULL ,
     '". intval($forumid)."',
     '". $dbcore->escape($title)."',
     '',
     '". time()."',
     '',
     '".$dbcore->escape($RCW['user']['userid'])."',
     '".intval($opened)."',
     '".  intval($status)."',
     '0',
     '0',
     '".  intval($levelforum)."',
     '". intval($displayorder)."',
     '".$dbcore->escape($urlredirect)."', '".intval($enabledbbc)."', '".intval($enabledsmiles)."', '".intval($enabledsignature)."'
     )")or die(mysql_error());
     
     if(!$result){return false;}
     $insert_id    = $dbcore->insert_id();
 $res = $dbcore->query("INSERT INTO `forumpostdata` (`forumpostdataid`,`forumid`,`forumtext`,`dateadd`,`dateedit`,`userid`,`keypost` )
 VALUES( NULL, '". intval($insert_id)."','". $dbcore->escape($forumtext)."' ,'". time()."','','".$dbcore->escape($RCW['user']['userid'])."','1')")or die(mysql_error());    
 
      if(!$res){return false;}
 
      return true  ; 

} 

e qui salvo il files :

function AddFilesDB($name ,$filessize)
{
   global $dbcore,$RCW ;
       if(empty($name))
      {
               return false;
      }
              if(!file_exists("../images/upload/". $name))
             {
               $filesname =   $name ; 
             }    else {
               $filesname  =  time() .'-'. $name;
                 rename  ( "../images/upload/".  $name,  "../images/upload/". $filesname );
                }
  $dbcore->query("INSERT INTO `attachment` (`attachmentid`,`filesid`,`filesname`,`originalname`,`filescomments`,`onpage`,`filessize`,`dateadd`,`dateedit` )VALUES(NULL,'','".$filesname."','".$name."','' ,'1','".$filessize."' ,'".time()."','' )  ");
  return true;
}
function AddFiles( $files  ,  $patch , $name ,$filessize)
{
if(empty($files))
{
    return false;
}
 $up =   move_uploaded_file($files , $patch );
 if(!$up){return false;}
  $res = AddFilesDB($name  ,$filessize);
 if(!$res){return false;} 
return true;
}