O_o has my 5017 redux been leaked already somehow?
Drop rules in it work same as in 5065. Depending on what version of the source you have, you MAY have a /adddroprule command or you may need to edit the database manually.
Drop rules are assigned by MonsterID, RuleType, RuleChance, RuleAmount and RuleValue
RuleType defines what happens when the rule is triggered (item on ground, item on inventory, money in inventory, cp in inventory, etc)
Rule Chance is how likely the rule is to happen whenever a monster of that ID is killed
Rule Amount determines if the rule should loop (EG: 50% with Amount of 5 means it will loop until either the if(%50) fails OR max amount has been reached. Not used often but can be useful sometimes)
RuleValue is what is awarded. If awarding an item it's the static ID of the reward, if it's a currency then it will be how much is earned.