On't know if it works, but try to redirect from the wap directory to your 4images directory. Creat in your wap directory a file index.php with the fllowing code:
<?php
header('Location: http://www.pramoga.net/?wap=1');
?>
and use the following code in global.php
if (isset($HTTP_GET_VARS['wap'])) {
$config['template_dir'] = $config['template_dir'] . '_wap';
}