patience, that's what a lot of people seem to lack this.....
First of all you have to unzip it, you cannot run it from the zip file. So, find the extract button and extract it to a folder. Before you extract make sure
use folder names is tagged!
Go to the folder were you've extracted the files to locate the tutorial folder. Open this folder and watch all of the movies in it, they will teach you how to use the segment editor. Now locate the file called FPSC-Segments.exe in the FPSCREATOR-SEGEDKIT folder and run that file. This is the editor itself.
Good luck and have fun with editing!
If I use FPSC to create a FPS? What's a FPS supposed to be anyway???