void main()
{
    object oPC = GetEnteringObject();
    object oDoor = GetNearestObjectByTag("NK_FP_DOOR04", OBJECT_SELF, 1);
    int nTotalWeight = GetLocalInt(OBJECT_SELF, "NK_FP_WEIGHT");
    int nSize = GetCreatureSize(oPC);
    int nWeight;
    if (nSize == CREATURE_SIZE_TINY)
    {
        nWeight = 1;
    }
    else if (nSize == CREATURE_SIZE_SMALL)
    {
        nWeight = 2;
    }
    else if (nSize == CREATURE_SIZE_MEDIUM)
    {
        nWeight = 3;
    }
    else if (nSize == CREATURE_SIZE_LARGE)
    {
        nWeight = 4;
    }
    else if (nSize == CREATURE_SIZE_HUGE)
    {
        nWeight = 5;
    }

    nTotalWeight = nTotalWeight - nWeight;
    SetLocalInt(OBJECT_SELF, "NK_FP_WEIGHT", nTotalWeight);
}