This is something quite basic...
To get to know the MobID of any mob, just do this:
Code:
Use PS_GameDefs
Select mobname, mobId from dbo.Mobs where Mobname like '%[name]%'
That will bring you the exact name and it's ID.
Now, for the grade ofthe items you do the same:
Code:
Use PS_GameDefs
Select itemname, grade from dbo.Items where Itemname like '%[name]%'
Done this you have the MobID of the mob you want to add the drop to, and the grade of the item you want this mob to drop, so basically all what is left is add the item as drop to the mob....
Code:
Use PS_GameDefs
Update dbo.MobItems set Grade = [item_grade], DropRate = [%]
where MobID = [mob_id] and ItemOrder = [number 1-9]
With this you have successfully added the item to be dropped by the mob you selected with a specific droprate.