1. Not directly, but there mods (or ways to mod) medals to be trivial to achieve. I don't have reliable links to the current 'best medal mod', but I do know how to edit the files so that when you start a new game, getting the annoying medals is stupidly trivial. Eg, you can open up medals.txt, seek out medal_crystals_collector_1 to medal_crystals_collector_5 and edit the 5 parameters for all 5 levels to be 1 crystal, and once you start the game and aquire any crystals, will get 5 promps on closing the hero screen to award you the 5 levels of that *&%$^ medal.
2. There are 2 options:
- Get the 'all units on Nordlig'-mod.
- Use Save Game Editing to give you the units. Read up on how on this thread.
3. The save scanner mentioned can help, but the by far best way to to look into the items.txt and items_monster.txt files in the ses.kfs which is somewhere in the <game location>\King's Bounty - Warriors of the North\sessions\<relevant campaign map>\
4. You could use the save-editting again, but you could also edit the hero.txt file, to start the game with the complete set. See spells.txt for the dev names of the spells
Edit: Aaaannd the thread is 3 years old. Well, maybe some future person will benefit from this info.