Drupal Ubercart Invoice edit page theming

Hi

I am using drupal 6 and integrate with Ubercart. I need to make invoice and fir that I am using uc_order module.

I need to add custom theme to http://"root"/admin/store/orders/####/edit page.

Can write node-tpl file...?

I wrote page-admin-store-orders-edit.tpl.php file it is working. I put

<?php

print($content);

?>

I got the rendered form but I can not Handel it.

I try to edit uc_order module but I is quite complex for me.

please help me. I am new for ubercart.

Thank you