If a customer select "ship my order" under select shipment method, 2 textfields

[fiatstudy]

If a customer selects "ship my order" under Please select a shipment method, 2 textfields should appear asking for cargo company name and tel. number.
Then after hitting save and we are back in the cart page, I should see both cargo company and tel. number underneath shipping method selected.


Upon checkout, the 2 information should also get written to the database along with the rest of the order details.



I'm interested in working for a client, but so far, have no ideas how to go about it.
Some pointers will be highly appreciated.