FEYNRules 2.0 is a Mathematica-based package designed to facilitate the implementation of particle physics models into high-energy physics tools. It calculates Feynman rules and outputs them in formats suitable for various programs such as CalcHEP, FeynArts, MadGraph, Sherpa, and Whizard. Since its original release, FEYNRules has added several new features, including support for two-component fermions, spin-3/2 and spin-2 fields, superspace notation, automatic mass diagonalization, and improved speed and efficiency. The package also includes a universal FEYNRules output interface and a new web-based validation package to ensure the accuracy and reliability of the implemented models. These enhancements enable theorists to quickly and efficiently build and simulate new models, compare them with experimental data, and perform phenomenological studies. The manual provides detailed instructions on how to use FEYNRules, including model description, parameter and particle class definitions, and the implementation of superfields and gauge groups.FEYNRules 2.0 is a Mathematica-based package designed to facilitate the implementation of particle physics models into high-energy physics tools. It calculates Feynman rules and outputs them in formats suitable for various programs such as CalcHEP, FeynArts, MadGraph, Sherpa, and Whizard. Since its original release, FEYNRules has added several new features, including support for two-component fermions, spin-3/2 and spin-2 fields, superspace notation, automatic mass diagonalization, and improved speed and efficiency. The package also includes a universal FEYNRules output interface and a new web-based validation package to ensure the accuracy and reliability of the implemented models. These enhancements enable theorists to quickly and efficiently build and simulate new models, compare them with experimental data, and perform phenomenological studies. The manual provides detailed instructions on how to use FEYNRules, including model description, parameter and particle class definitions, and the implementation of superfields and gauge groups.