Install the game through the .iso first. Then simply copy everything in the other folders (Crack and Update) to where you installed the game, overwrite whatever it asks you to.
I haven't played this but the DLCs are really cheaty according to some reviews, and some of them should only be used/bought when you reach endgame. If you want to disable any of them simply go to 3DMGAME.ini and find these lines: 367415=Fairy Fencer F: Weapon Change Accessory Set 367414=Fairy Fencer F: Ultimate Armor Pack 367413=Fairy Fencer F: Surpass Your Limits Set 367412=Fairy Fencer F: Additional Fairy Pack 367411=Fairy Fencer F: Swimwear Set 367410=Fairy Fencer F: Hot Springs Set Remove whichever you feel like are too overpowered/should only be used later, keep in mind if you start a new game with these enabled you'll get the rewards right away, if you disable these and enable them later on you'll still get the rewards when you reload your game after enabling them. I'd not recommend disabling them after you started a game with them enabled. DLCs on Steam: http://store.steampowered.com/app/367410/ http://store.steampowered.com/app/367411/ http://store.steampowered.com/app/367412/ http://store.steampowered.com/app/367413/ http://store.steampowered.com/app/367414/ http://store.steampowered.com/app/367415/
If you like the game, buy it on Steam, support future releases.