I don't think you know how to use Moddb
step 1: Click download now and download it, then save as downloads.
step 2: Assuming you got past step one extract the files from the download to wherever your mount and blade warband then modules and you are done
step 3:Idk, just start the game and look for the module you want and then play.
step 4: Wait for the game to load.
step 5: click start new game.
step 6: Who cares just enjoy.