This is the Third book in the series on Dynamic Universe Model, describing the SITA software in EXCEL in the accompanying CD / DVD emphasizing mainly HANDS ON usage of a simplified version. It explains 3000 equations for 133 masses [instead of earlier 21000, in 17 different groups with additional 14 Index functions and 56 single equations. There are 16 ranges, 11 macros & processes and 18 graphs to view and monitor various parameters. SITA is singularity-free, inter-body collision free and dynamically stable. Here basically how to tune, select input values, how to iterate & run to get the results in EXCEL, how to select time step values, to analyze data and using Graphs etc., are presented. This SITA solution can be used by anyone who knows a little about EXCEL and little bit interested in Physics for solving presently unsolved applications like Pioneer anomaly, New Horizons satellite trajectory at the Solar system level, Missing mass due to Star circular velocities and Galaxy disk formation at Galaxy level etc., that is from the Solar system level, to Cosmology level via Galaxy level. See blog http://vaksdynamicuniversemodel.blogspot.com