[B]How to change drop item in each map??[/B]

Hello guys
once again i need your helps...i want to ask you how to make every map drop
differents item i means how to make mobs drop rndom portal,elite items,or such on like that...can some one tell me that clearly..?

2nd question: how i do to change it what column need to check..
thanks;)

1. you will need your cq_monstertype and cq_dropitemrule.
2. E.G. cronus contains only madbulls,GreenDiants and bullywangs, lok for them in cq_monstertype.
3. look at the ids of the monsters and copy madbulls id, then go to cq_dropitemrule.
4. then look for your monstertype id in cq_dropitemrule in column, group_id.
5. in cq_dropitemrule you will see columns item0 - item14, chnage the numbers in those columns for the group id, those numbers are the items that monsters drop.

thanks alot