  We present a detailed description of a FORTRAN code for evaluation of the
resonance contribution a Regge trajectory makes to the integral state-to-state
cross section (ICS) within a specified range of energies. The contribution is
evaluated with the help of the Mulholland formula [Macek et al (2004)] and its
variants [Sokolovski et al (2007); Sokolovski and Akhmatskaya (2011)]. Regge
pole positions and residues are obtained by analytically continuing S-matrix
element, evaluated numerically for the physical values of the total angular
momentum, into the complex angular momentum plane using the PADE II program
[Sokolovski et al (2011)]. The code decomposes an elastic, inelastic, or
reactive ICS into a structured, resonance, and a smooth, "direct", components,
and attributes observed resonance structure to resonance Regge trajectories.
The package has been successfully tested on several models, as well as the F +
H2->HF+H benchmark reaction. Several detailed examples are given in the text.
