function replace($original_name, $cur_location)
	{
		$proto = proto($cur_location);
		Q("UPDATE fud_attach SET proto='$proto', original_name='$original_name', location='$cur_location' WHERE id=".$this->id);
		if ( $proto == 'LOCAL' ) {
$loc = $GLOBALS['FILE_STORE'].$this->id.'.atch'; // '/'.
			if ( file_exists($loc) ) unlink($loc);
			safe_attachment_copy($cur_location, $id);
		}
	}

function safe_attachment_copy($source, $id)
{
	$loc = $GLOBALS['FILE_STORE'].$id.'.atch';	//'/'.	
if ( file_exists($loc) ) {
		unlink($loc);
		std_out('"'.$loc.'" already exists, but shouldn't (old file unlinked), check security', 'ERR');
	}
	
	$fp = @fopen($loc, 'w');
	if ( !$fp ) {
		std_out('unable to create source file ('.$loc.') check permissions on ('.$GLOBALS['FILE_STORE'].'), we suggest 1777', 'ERR');
		exit('file attachment error');
	}
	chmod($loc, 0644);
	
	$fp_s = fopen($source, 'r');
	if ( !$fp_s ) {
		fclose($fp);
		std_out('unable to read temporary attachment file, ('.$source.')', 'ERR');
		exit('file attachment error');
	}
	
	while ( $str=fread($fp_s, 4096) ) {
		fwrite($fp, $str);
	}	
	fclose($fp);
	fclose($fp_s);
	
	return $loc;
}