Need Help with world editor (Unit Editor mostly)

Well first off hello everyone. So I've begun to "play" with the warcraft 3 files and try to change things and so on. And I've decided why not edit the story campaign by making my own units and so on. The problem is now I will need to open every single campaign map (there are 9 for each race) and change the stats of units and stuff piece per piece, which is kinda long. So I wanted to know if there is a way to edit unit stats (spells and so on) only once so I don't need to remake it for every single map.

For example: Let's say I wanna make arthas have instead of ressurection spell the Inferno spell, I wan't my Knight to take 2 food instead of 4 and so on.

Now you will say export-import your data, the problem is if I do that I'll lose the custom units that blizzard has made for their every single campain map. (For every campain there are custom made units that change names and so on)

So um I wanted to know, when I open Worldedit there is somewhere a file that the world edit will use to load the unit stats the default stats.(the file is probably in the MPQ file) So does anyone know whats the file name, that contains the default unit stats, so I can edit that file and then whenever I open Worldedit it will use the edited file.

Thanks in advance everyone,
Cloud

use the campaign editor

the stats and such are probably loaded from the sylk files.