(temporarely) set some information for the given item. Information changed will be changed for all items of that ID.

Possible types are:
0 value_buy;
1 value_sell;
2 type;
3 maxchance = Max drop chance of this item e.g. 1 = 0.01% , etc..
if = 0, then monsters don't drop it at all (rare or a quest item)
if = 10000, then this item is sold in NPC shops only
4 sex;
5 equip;
6 weight;
7 atk;
8 def;
9 range;
10 slot;
11 look;
12 elv;
13 wlv;
14 view id
These types are the same as the ones used in the item_db.txt/item_db table, which allows you to change some items dynamically.

(Side note:) Examples and such will come later