Equips given Items to the Unit. Using 0 removes the equipped Item
Creature:SetEquipmentSlots( main_hand, off_hand, ranged )
number main_hand
Main hand Item's entry.
Valid numbers: integers from 0 to 4,294,967,295.
number off_hand
Off hand Item's entry.
Valid numbers: integers from 0 to 4,294,967,295.
number ranged
Ranged Item's entry.
Valid numbers: integers from 0 to 4,294,967,295.
Nothing.