I find this http://rathena.org/wiki/Custom_Items#System.2FItemInfo.lub
so
[<item id>] = {
unidentifiedDisplayName = <item name to show when not magnified>,
unidentifiedResourceName = <file name prefix used for all the images and drop sprite when not magnified>,
unidentifiedDescriptionName = { <comma separated list of strings>,<to get multiple lines>,<in item description> },
identifiedDisplayName = <item name to show when magnified>,
identifiedResourceName = <file name prefix used for all the images and drop sprite when magnified>,
identifiedDescriptionName = { <same format as unidentifiedDescriptionName but for magnified items> },
slotCount = <number of slots>,
ClassNum = <View ID - yes the same one that was there item_db>
},
Exemple Given:
[25000] = {
unidentifiedDisplayName = "Sword",
unidentifiedResourceName = "¼Òµå",
unidentifiedDescriptionName = { "Unidentified item, can be identified with [Magnifier]." },
identifiedDisplayName = "Devastator",
identifiedResourceName = "Black_Sword",
identifiedDescriptionName = {
"An Unholy Sword that was created with the sole purpose of destruction",
"Class :^777777 Sword^000000",
"Attack :^777777 325^000000",
"Weight :^777777 80^000000",
"Weapon Level :^777777 4^000000",
"Required Level :^777777 100^000000",
"Applicable Job :^777777 Novice, Swordsman Class, Merchant Class, Thief Class^000000"
},
slotCount = 3,
ClassNum = 2
},