600 to 644 changing permissions on upload in php

i have an auction web site and in the gallary section people can upload
more then 1 picture but the files are being uploaded as per 600(chmod) and
they need to be 644 or 755. I'v put the part of the php texted that i
think needs editing below.

#// PROCESS UPLOADED FILE
if($HTTP_POST_VARS[uploadpicture] == $MSG_681)
{
if(!empty($HTTP_POST_FILES[userfile][tmp_name]) &&
$HTTP_POST_FILES[userfile][tmp_name] != "none")
{
if($HTTP_POST_FILES[userfile][size] >
($SETTINGS[maxpicturesize] * 1024))
{
$ERR =
$ERR_709." ".$SETTINGS[maxpicturesize]." Kbytes";
}
elseif(!strpos($HTTP_POST_FILES[userfile][type],"gif") &&
!strpos($HTTP_POST_FILES[userfile][type],"png") &&
!strpos($HTTP_POST_FILES[userfile][type],"jpeg"))
{
$ERR = $ERR_710."(".$HTTP_POST_FILES[userfile][type].")";
}
else
{
#// Create a TMP directory for this session (if not
already created)
if(!file_exists($image_upload_path.session_id()))
{
mkdir($image_upload_path.session_id(),0777);
}
#// Move uploaded file into TMP directory
move_uploaded_file($HTTP_POST_FILES[userfile][tmp_name],

$image_upload_path.session_id()."/".$HTTP_POST_FILES[userfile][name]);

#//Populate arrays
$UPLOADED_PICTURES[] = $HTTP_POST_FILES[userfile][name];
$UPLOADED_PICTURES_SIZE[] =
$HTTP_POST_FILES[userfile][size];

session_name($SESSION_NAME);
session_register(UPLOADED_PICTURES,UPLOADED_PICTUR ES_SIZE);


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