Post your shortcut's target, there might be a small mistake there
And also say where you created your mod's folder
editing the files is simple. Simply open them in Notepad (Or
Notepad++ with ColourINI if you have it, it's much better)
Both ini files and inc files can be opened and edited
The best way to check if your mod is read, is to go to your ModFolder\Data\ini\playertemplate.ini, open up that file, and find the Men faction. Then find the buildable heroes. It should say about "CreateAHero GondorBoromir GondorGandalf (and so on, and something like that..)
Now, after GondorBoromir put a ; sign. So it looks something like this: CreateAHero GondorBoromir ; GondorGandalf GondorWhateverHero
The ; will "hide" everything behind it on the same line so it doesn't get read by the game. So this means that any hero for Men that is after Boromir shouldn't be able to be buildt now.
Now simply run the mod, play as Men and see what heroes can be buildt. If you can only build Boromir (and CreateAHero if you have that on) then you're mod is read and applied correctly. If all the normal heroes are there aswell (Aragorn, Gandalf, Theoden, Eomer, ect..) then it isn't read and not applied