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How to make the free trial version
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Put this on top

<?php $notice=<<<_EOM_
<!--


 替え玉君(無料お試し版)
 ID:NHKDK-219J-FREE_TRIAL_VERSION
 http://jpn.phpkobo.com/kaedama-kun


 【注】この「替え玉君(無料お試し版)」は開発環境でテスト・評価するためのものです。
 不特定多数の訪問者が閲覧する環境では不適合な仕様ですので使用しないでください。


-->
_EOM_;
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Put this before javascript starts

<?php echo $notice; ?>
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Repalce

$bpass="XZESM-XUGGI-QTSWY-JBVDS";

with

$bpass="0Free-Trial-Versi-on000";
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if(($pp=_sp("SCRIPT_NAME"))&&($up=_sp("REQUEST_URI"))&&(basename($pp)!=basename($up))){
if(($pp=_sp("SCRIPT_NAME"))&&($up=_sp("REQUEST_URI"))){
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	if(($rm=="POST")&&!empty($_POST["tk"])&&($rp=_sp("HTTP_REFERER"))){
	if(($rm=="POST")&&($rp=_sp("HTTP_REFERER"))){
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Remove
		$pc=$bpass."-".$_POST["tk"];
		session_cache_limiter("nocache");
		@session_start();
		if(!empty($_SESSION[$pc])&&(intval($_SESSION[$pc])+10>time())){
			unset($_SESSION[$pc]);
			@session_write_close();
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Remove
			if(($rp==$up)&&(substr($zp,0,strlen($bp))==$bp)){
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	}else if(($rm=="GET")&&empty($_GET["tk"])){
	}else if(($rm=="GET")){
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Replace
		$tk="";
		$tk.=((isset($_SERVER['REMOTE_ADDR'])?substr($_SERVER['REMOTE_ADDR'],0,100):"IP")."-");
		$tk.=(date("Ymd-His")."-");
		$chars="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
		for($i=0;$i<64;$i++){
			$idx=rand(0,strlen($chars)-1);
			$tk.=$chars[$idx];
		}
		$pc=$bpass."-".$tk;
		session_cache_limiter("nocache");
		@session_start();
		$_SESSION[$pc]=time();
		@session_write_close();
with
		$tk="無料お試し版";
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