on my portable I have Excel 64 bits (Windows 8) working with PRODE PROPERTIES,
Excel works fine and indeed it is capable to calculate a whole vapor-liquid-liquid phase envelope / phase diagram including critical points, cricondenbar and cricondentherm in a few seconds,
the Excel page provided with PRODE in addition to phase envelope includes several other diagrams

P-S , P-H, P-V

I would add

T-S , T-H, T-V

is that possible?
(the data calculated in my opinion should give that possibility)