It's possible to show uploaded file in review page and create a limitation for the file size. You need to customize some files for this, for showing the image on review page, you can follow to these steps :
1. Edit "includes/entry-functions.php" file and go to around line 383, you'll see these code :
$file_1 = substr($filename_value,strpos($filename_value,'-')+1);
then put this code exactly above that line
$filename_basic = $filename_value ;
2. Go to around line 406 ~ 408 for these code :
if(!empty($options['show_attach_image'])){
$entry_details[$i]['value'] = '<img src="'.$options['machform_path'].'images/icons/attach.gif" align="absmiddle" /> '.$filename_value;
}
then put these code exactly bellow that code
if(!empty($options['show_image_directly'])){
$entry_details[$i]['value'] = '<img width="200px" height="200px" src="http'.$ssl_suffix.'://'. $_SERVER['HTTP_HOST'] .dirname($_SERVER['PHP_SELF']) . '/data/form_' . $form_id . '/files/'. $filename_basic . '.tmp" /> ';
}
3. Edit "includes/view-functions.php" file, in line 2326 you'll see this code
$param['show_attach_image'] = true;
then put this code bellow that line
$param['show_image_directly'] = true;
And to limit upload file size, you can use the method that posted in here :
http://www.appnitro.com/forums/topic/file-size-error-message?replies=7#post-4082