string texture;
default
{
    state_entry()
    {
       texture=llGetInventoryName(INVENTORY_TEXTURE,0);
    }

    touch_start(integer total_number)
    {
        if (llDetectedGroup(0))
        {
            llAllowInventoryDrop(TRUE);
            llInstantMessage(llDetectedKey(0),"Drop in your texture");
        }
        else
        {
            llInstantMessage(llDetectedKey(0),"Wrong group");
        }
    }

    changed(integer change)
    {
        if (change & CHANGED_ALLOWED_DROP | change & CHANGED_INVENTORY)
        {
            integer total = llGetInventoryNumber(INVENTORY_TEXTURE);
            if (total > 1)
            {
                integer i;
                for(i=total;i>=0;i--)
                {
                    string temp = llGetInventoryName(INVENTORY_TEXTURE,i);
                    if(temp!=texture && temp!="")
                    {
                       texture=temp;
                       llSetTexture(texture,ALL_SIDES);
                       integer k;
                        for(k=total-1;k>=0;k--)
                        {
                            string delete = llGetInventoryName(INVENTORY_TEXTURE,k);
                            if(delete!=texture)
                            {
                                llRemoveInventory(delete);
                            }
                        }
                    }
                }
            }
        }
    }
}