Automatic Test Equipment (ATE) obsolescence drives a requirement for rehosting Test Program Sets (TPSs). However, due to the many variations of programming languages, in most cases, the target language of the new ATE platform differs from the legacy language. This paper discusses a flexible, modular software approach for TPS rehost efforts. The new approach can be used to convert code while also allowing for the automated creation of additional output products (e.g., Test Requirements Document (TRD), Automatic Test Markup Language (ATML) files, fault universe, and ATE instrument requirements). Furthermore, the modular design and nonspecific, intermediate data structure significantly improves code reusability for rehosting between different ATE platforms. Additionally, as a case study, this paper discusses the benefits achieved using this approach.