some mod questions from a newbie

[Dakaar]

Hi all, got this game recently and been searching and browsing with a view to (eventually!) creating a whole fantasy setting based on my own design (remodelling all races etc) and have a few questions i havent been able to answer:

1) Is it possible to alter the mercenaries, either by mod commands or by altering the units and commanders the existing ones use? I dont think i can modify the mercenaries and am unable to find any reference of which units are used as mercenary troops/commanders and which ones, or indeed any listing of the various mercenaries available.

2) Is it possible to change, delete or add to the random events in any way?

3) From what ive read you cant add magic sites as its a hard coded number, but is there anyway to change existing ones?

4) I can see that you can edit the parameters of existing spells but not add new ones (unless im mistaken) can you rename a spell as well? so for example you can take a spell you dont want in your setting and totaly modify and rename it to a spell you want to add, or will you be stuck with the old name for the new spell?

5) Further to the changing of spells, is there anyway to set/change the sprite used for a spell, and is there a listing on these available anywhere?

6) Is there anyway to change special nation/theme powers or will they always be present, for example if i changed mictian would the replacement nation always need to blood sacrifice to gain dominion? Or would Ermor ashen empire always destroy population and generate the set troops in its provinces (subject to those troops being edited of course =p) Finally will go out on a huge limb and ask if theres any kinf of reference to all these abilities and what they entail (using ermor as an example again, the full list of what troop types and commanders can turn up in the ashen empire provinces. This is just an example as i think i have that one worked out from playing it)

Thanks in advance for any help anyone is able to give to a fresh modder with big ambitions!