How do i install the free mesh X scenery

Quetion: I download from Fly Away the file SRTsam.zip but its package not include the file.txt README and I don`t know how install the package.

Going over all questions posted on this subject, some of them posted by people that is way behind the process of adding this add-on, I`d like to pose 2 questions that may clarify a little bit more some "grey areas". To clairify, as I understood I launch FSX, go to settings/ scenery library/add area and Browse to where I extracted the FreeMesh X add-on & select  the first of the "FreeMeshX" titled folders providing that they are at the top of your scenery library . So far so good. Fairly simple (& not much different from adding any other scenery to the file "add-on scenery". So here we go.
1st.Question: "Please make sure that FreeMeshX is placed above all default terrain entries in your Scenery Library"  and "is placed below all airports, FTX regions, or landclasses.  How do I assure that? 
2nd. Question: "It is important to use a vector update tool, such as FTX Vectors or UTX, otherwise, the topography will be incorrect."
I got FTX Vectors wich I never worked with. Do I need to run/execute it each time I add a MeshX scenery, or can I do it at the end, once everything is installed?
And that`s all I had to ask. Looking forward for some kind of help for these 2 questions, I wish you all simflyers good winds and happy landings.
Miguel