Had some difficulty with v 1.0.2 on my WAMP test site, zc 1.5.5a, updated Responsive Sheffield Blue, Canada Post only shipping mod

Am I correct that the ajax.php file should be in the pre-1.5.5 folder rather than in the root (ie not to be merged in 1.5.5.a install)?

Also, includes/temp/temp_default/temp/tpl_checkout_one_confirmation_default, around line #189:

Code:
echo zen_draw_form ('checkout_confirmation', $form_action_url, 'post', 'id="checkout_confirmation"' . ($confirmation_required) ? ' onsubmit="submitonce();"' : '');
Should that be 'confirmation_one' rather than 'checkout_confirmation'.

If I leave ajax.php alone, and change the 'checkout_confirmation' then I am able to proceed with a transaction as far as I can with a test store and fake customer and no curl for paypal - which is to say I get a paypal error message on top of the one page checkout, and I get an email from admin notifying me of the error.

Without the above changes when I click checkout I get a death spiral of the loading gif ;o) (I tried to attach log of this in code quote but it seems to be too big as it won't send).

(I acknowledge Canada Post isn't in the list of validated shipping for this mod, but it 'seems' to work with the fiddling above, test site only, although it does select most expensive CP shipping choice by default)