Nerengot

Good time of day. I would like to know how to change the hero's equipment system. Not 5 slots, but let's say 9. Well, new types of items in them. For example: Weapon Armor Helmet Boots Gloves Ring 1 Ring 2 Amulet Raincoat I will be very grateful for detailed instructions. It is advisable to explain everything to the letter, since there is no special experience in such things.