1. A form user interface modification engine for use in customizing forms of an application, the form user interface modification engine comprising: an export component which retrieves a first binary format form for customization, wherein the export component is configured to deserialize the first binary format form and to convert the first binary format form into a first XML format form; and an import component which receives a customized XML format form created using the first XML format form, wherein the import component is configured to serialize the customized XML format form and to store the customized XML format form as an XML layer with a reference to the associated first binary format form.