Enable Renewal Item(Aura) in Pre-Renewal Client

[Sour-]

    [20132] = {
        unidentifiedDisplayName = "Mouth Mask",
        unidentifiedResourceName = "¸®º»",
        unidentifiedDescriptionName = {
            "Unknown Item, can be identified by using a ^6666CCMagnifier^000000."
        },
        identifiedDisplayName = "Costume Vicious Mind Aura",
        identifiedResourceName = "»ç³äÀÇ¿À¿À¶ó",
        identifiedDescriptionName = {
            "Unknown aura that wrapped your body.",
            "Class:^6666CC Costume^000000",
            "Location:^6666CC Lower^000000",
            "Weight:^009900 0^000000",
            "Level Requirement:^009900 1^000000",
            "Jobs:^6666CC All classes^000000"
        },
        slotCount = 0,
        ClassNum = 1267

Iteminfo(renewal) to idnum2(pre renewal)

All 3 idnum2 were edited. I used the same data.grf and rdata.grf for both renewal and pre renewal.

The sprite worked in the inventory. But when worn, the client crashes. How is this so?
Also where to place ClassNum in a prerenewal client? Is the missing ClassNum the problem?

Edited May 1, 2017 by Emistry
Misleading topic title.

[Promise]

You can just copy the item files, and add them as pre-renewal custom items.

If you dont know how to add custom items, watch this guide.

Btw... wich client date are you using?