A system, method for modifying insurance transaction processing software are provided. A library of code packets may be stored in a database. One or more code packets may implement at least one business requirement of an insurance organization. If the organization changes one of the business requirements or develops a new business requirement, a user may modify an insurance transaction processing program to reflect the change via a rules engine. The rules engine may be operable to generate program code assembly instructions based on user input. The assembly instructions may be used by a code assembler to form program code for an insurance transaction processing program software module. The insurance transaction processing program may be changed by adding a formed software module.