I did just try a header redirect to /checkout/onepage/ but it reset all the fields It’s never the simple solution huh?
The reason why the button doesn’t work on click is because it’s outside the <form></form>, you also need to add the action and set the method to post to make the forms work.
<form id="co-billing-form" action="<?php echo $this->getUrl('checkout/onepage/saveBilling'); ?>" method="post">
I’ll keep playing with this as it’s a deal-breaker for us and I’m *really* not in the mood to have to redo all of our customisations on another cart .... and our client would probably be a tad upset if they had to redo all their stock
I’ll let you know if I strike gold ... even if it is by pure luck :D