A) Copy one of the existing files that has all the required terms to a new file in the appropriate folder
B) Update all the coefficients
C) Add "FluidsList.push_back(new FLUIDNAMEClass());" to FluidClass.cpp
D) Add '#include "YOURFLUIDFILENAME.h"' to FluidClass.cpp
E) Add #include "YOURFLUIDFILENAME.cpp to AllFluids.cpp