Do you put them in
King`s Bounty - Warriors of the North\sessions\addon ?
And wait 10 secs ingame
.
(From text file : Wait for a short while (10 secs or so until the next rage/mana update to be precise), and the army shop item will be added to your inventory.)
If you want to use beyond one mod (2 or 3), it's restricted to have to put
mod_wn131_eng_mod_pack only or they wont work completely .