Hey! Yes, the SkyTest software was really useful on the first part of the FEAST test. Now, about the second part, the Strip Display Management test, i don't really know what to say. The test simulation is pretty much the same from what i've heard, but the instructions of the actual SDM test are more complex and more understandable. So, all in all, i suggest you use the SkyTest software at least for the first part of the FEAST. It will really help you.
Best of luck!