Customization of Address Fields on Checkout page

-- HikaShop version -- : 2.3.3
-- Joomla version -- : 3.3.2
-- PHP version -- : 5.5.15
-- Browser(s) name and version -- : Chrome

Hi,

During the checkout the customer is asked for two addresses Billing & Shipping.

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Query 1:

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In both of these addresses, I want to change the way the address fields are displayed and want to show them as per the US format instead of just one single box. Also I want to show two seperate boxes for entering telephone numbers, i.e. one small box for entering country code and immediately besides it the telephone number.

How can we do this? I understand that I can make use of custom fields. But then I can't organize the telephone country code and the number side by side. Also I can't order the custom fields below the default ones.

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Query 2:

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I want to just add a text message (no text input box/field) below the both titles viz. 'Billing Address' & 'Shipping Address'. This message will be a short info about which product will be delivered to which address. For example Product 1 will be shipped to Billing Address & Product 2 will be shipped to Shipping Address.


Useful guidance will be appreciated. Thanks in Advance.