[Bella Forma]

Thanks for the link CopperB I hadn't seen that post, will put it on my pile of things to do... which never seems to get any smaller!!

As one good turn deserves another....

Regarding the javascript changes you shouldn't need to make any.

Just cut and paste the code in your message from register_billing_address.tpl to register_shipping_address.tpl and as long as you don't have both checkboxes and your calling the javascript from the customer/home.tpl as described earlier the javascript will work exactly the same as before.