Naming uploaded files?

[Super-Yombario]

<?php
	if($_FILES['file']['error']==0){
		if($_FILES['file']['type']=='image/gif'||$_FILES['file']['type']=='image/png'||$_FILES['file']['size']>13333337){
			move_uploaded_file($_FILES['file']['tmp_name'],'./images/'.$_FILES['file']['name']);
			echo 'The file is located <a href="./images/'.$_FILES['file']['name'].'">Here</a>';
		}elseif(file_exists('./'.$_FILES['file']['name'])){
			echo 'This file already exists; Please upload another';
		}else{
			echo 'Incorrect file type; Must be a GIF or PNG image';
		}
	}else{
		'There was an error with your upload; '.$_FILES['file']['error'];
	}
?>

That's the code I have for uploading, but how do I rename the files after they are uploaded and before I move them?

[WoogieNoogie]

$_FILES['data']['name'] = putstuffhere