How to customize the paypal-registration-form

I would like to customize the form like a paper with physical registering form.
I basically created a form but I would like to ask if there is a mistyping error during submit, the process will turn to this page again but all the typed information will be erased. I would like to ask why it happen.

I find that only the custom_fields will be erased.

<input type="checkbox" value="Founding Members" name="s2member_pro_paypal_registration[custom_fields][member][]" id="s2member-pro-paypal-registration-custom-reg-field-member-0" aria-required="true" tabindex="106" class="s2member-pro-paypal-custom-reg-field-member s2member-pro-paypal-registration-custom-reg-field-member">

Thank you very much.

Here is my set-up and it is basely worked.

And I would like to add the agreement that the users must agree.
I have already add a custom field and there is no a checking when the user can submit the form and do not tick the agreement check box.

Please help.

Try this post:

Knowledge Base » Force Terms & Conditions agreement

Who can answer my first one question?

Hi there,

s2Member populates these fields through a shortcode, and does not support this functionality. I’ll ask if there’s a possibility of this changing in a future version of s2Member, but in the meantime if you’d like to check out the possibility of adding this in to your version of s2Member, check out the file /s2member-pro/includes/classes/gateways/paypal/paypal-form-in.inc.php, at line 292.