Much as I appreciate the 'Fly with Lua' forum on .org, answers to my questions assume that I understand 'Lua'.  I've been trying to install a 'rendering' software and don't know if I've accomplished anything.  Forkboy's version is the simplest - a straight Lua script file (Notepad) placed directly in Plugins/FlywithLua/Scripts.  I edit the Notepad to the values I want then 'save' and that's it from me.  Is there more?

No thats about it.  LUA is a scripting language so when you drop a file into that scripts folder, the compiler see its, compiles and runs.  Its no different than any other language like c++, only much simpler.  

Thanks for the speedy reply - at my age 'simple' is good .