printmonster.css

._list {
  padding-top: 20px;
}
._item {
  padding: 0 0 10px;
  display: inline-block;
  text-align: center;
  vertical-align: top;
  width: 100px;
  word-break: break-word;
  font-size: 12px;
  line-height: normal;
}
._item img {
  display: block;
  width: 80px;
  height: 80px;
  padding: 0 10px 6px;
}

printmonster.js

$ = uploadcare.jQuery;

$(function() {
    function installWidgetPreviewMultiple(widget, list, data) {
      widget.onChange(function(fileGroup) {
        list.empty();
        data.val('');
        if (fileGroup) {
          $.when.apply(null, fileGroup.files()).done(function() {
            $.each(arguments, function(i, fileInfo) {
              var src = fileInfo.cdnUrl + '-/scale_crop/160x160/center/';
              list.append(
                $('<div/>', {'class': '_item'}).append(
                  [$('<img/>', {src: src}), fileInfo.name])
              );
              data.val(data.val() + "\n" + fileInfo.cdnUrl);
            });
          });
        }
      });
    }

    $('.pwebcontact-form').attr('role', "uploadcare-upload-form");
    $('#pwebcontact1_field-upload')
        .attr("role", "uploadcare-uploader")
        .data("multiple", "true")
        .hide();
    $('#pwebcontact1_field-uploads').hide();
    $('#pwebcontact1_field-uploads-lbl').hide();
    $('#pwebcontact1_field-uploads').after('<div class="_tb_list"></div>');
    uploadcare.start();
    var widget = uploadcare.MultipleWidget('[role=uploadcare-uploader]');
    installWidgetPreviewMultiple(widget, $('._tb_list'), $('#pwebcontact1_field-uploads'));
});