A Mod which mods a Mod

[Meakin]

At first, I really like your mod and played it several times on different servers.
Now there is a new server, which I wish to support.
The problem is that the story of this server is different from the discovery mod story.

So my idea was, because otherwise the server has to use 4.84, to make a second miniMod, which is
loaded after Discovery and sets i.e. the relationships between Liberty and Rheinland back to normal.

Making a Mod which edited the relationsships between factions is no real problem for me, but there are some problems left:

a) First important thing: am I allowed to do this? Becuase the creators of Discovery have used lots of time to make there wonderful mod and so the maybe dont like it when I try to edited some things on it.

b) Is it possible to make a Mod which edited an existing Mod (I think I just have to modificate the mod data and not the vanilla files)

c) Is it possible to load after Discovery a second mod which replaces some files, which were edited before by Discovery, or would the game crash or would flmm forbid these

(The Idea is overtaken from Oblivion were it was possible, through a different order of mod loading to edit files which were before edited by another mod)