O.K,
I will try adding validation to the checkout.php created by ecart 5.
Can the existing checkout.php be replaced with the one that gets modified by css form builder ? I do not want to re-do the ecart 5 wizard the newly generated checkout.php to talk to the rest of the ecart 5 files in place (confirm, pp_confirm, checkout_success, etc.,)
That way if it does not work, I can simply revert to my old checkout page and keep the site running.
Thanks