Upload Multiple image attachments and save them as custom fields via Front-End

Hi guys,
Need some help on this one. I’m trying to upload multiple image attachments via Front-End and save their IDs in custom fields.

Right now only the first image gets saved as custom field (tds_shop_photo), but all of them are being uploaded to Media Libary. Need to be able to save all of them.

Here’s the code (functions.php)

function insert_attachment($file_handler,$post_id,$setthumb='false') {
    // check to make sure its a successful upload
    if ($_FILES[$file_handler]['error'] !== UPLOAD_ERR_OK) __return_false();

    require_once(ABSPATH . "wp-admin" . '/includes/image.php');
    require_once(ABSPATH . "wp-admin" . '/includes/file.php');
    require_once(ABSPATH . "wp-admin" . '/includes/media.php');

    $attach_id = media_handle_upload( $file_handler, $post_id );

	//$src = wp_get_attachment_image_src($attach_id,'full');
    if ($setthumb)
				   update_post_meta($post_id,'tds_shop_photo',$attach_id); // shop photo
				   update_post_meta($post_id,'tds_shop_logo',$attach_id); // shop logo
				   update_post_meta($post_id,'tds_shop_cover_image',$attach_id); // shop cover image
    return $attach_id;
}

Front-End upload page

/* IMAGE UPLOAD */
	if ($_FILES) {
    foreach ($_FILES as $file => $array) {
    $newupload = insert_attachment($file,$pid);
    // $newupload returns the attachment id of the file that
    // was just uploaded. Do whatever you want with that now.
    }
	}

Image upload form

<fieldset class="images">
<label for="images">Shop Photo</label>
<input type="file" name="tds_shop_photo" id="tds_shop_photo" size="50" multiple>

<label for="images">Shop Logo</label>
<input type="file" name="tds_shop_logo" id="tds_shop_logo" size="50" multiple>

<label for=”images”>Shop Cover Image</label>
<input type=”file” name=”tds_shop_cover_image” id=”tds_shop_cover_image” size=”50″ multiple>
</fieldset>