Abstract: A method and system for transacting business over an electronic communication network. The method includes generating a request and a response for a business transaction over the communication network from a buyer computer and a seller computer, respectively. A third party computer receives the request and response and generates a separate transaction to obtain transportation, insurance and/or a warranty for goods associated with the request. The third party computer can select the transportation, insurance and/or warranty from a plurality of bids transmitted through the communication network. The third party can receive payment from the selected transportation, insurance and/or warranty entity. The system also maps data of a data file to user specified data fields generated at a graphical user interface (GUI). The specified fields are correlated with predefined fields of the data file. This allows the end user to customize their GUI. The system can also map data without dumping an entire data file.