In FrontEndWarZ.CPP
AFTER THIS
gfxMovie.RegisterEventHandler("eventMarketplaceActive", MAKE_CALLBACK(eventMarketplaceActive));	

ADD THIS	
gfxMovie.RegisterEventHandler("eventMoveAllItems", MAKE_CALLBACK(eventMoveAllItems));

AFTER THIS FUNCTION
void FrontendWarZ::OnDonateToServerSuccess()

ADD THIS ENTERY ONE
void FrontendWarZ::eventMoveAllItems(r3dScaleformMovie* pMovie, const Scaleform::GFx::Value* args, unsigned argCount)
{
	//Simple logic for buttons, move all items from backpack to inventory
	const wiCharDataFull& slot = gUserProfile.ProfileData.ArmorySlots[gUserProfile.SelectedCharID];
	if(!(slot.GameFlags & wiCharDataFull::GAMEFLAG_NearPostBox))
		return;

	int itemsToMove = 0;
	for(int i=8; i < slot.BackpackSize; ++i)
	{
		const wiInventoryItem& wi = slot.Items[i];
		if(wi.itemID > 0)
		{
			itemsToMove++;
		}
	}

	if(itemsToMove)
	{
		if((gUserProfile.ProfileData.NumItems + itemsToMove) > wiUserProfile::INVENTORY_SIZE_LIMIT)
		{
			Scaleform::GFx::Value vars[3];
			vars[0].SetString(gLangMngr.getString("InGameUI_ErrorMsg_NoInventorySpace"));
			vars[1].SetBoolean(true);
			vars[2].SetString("$ERROR");
			gfxMovie.Invoke("_root.api.showInfoMsg", vars, 3);
			return;
		}
	}
	else
	{
		//If we don't find any item, don't do anything.
		return;
	}

	Scaleform::GFx::Value var[2];
	var[0].SetString(gLangMngr.getString("OneMomentPlease"));
	var[1].SetBoolean(false);
	gfxMovie.Invoke("_root.api.showInfoMsg", var, 2);

	StartAsyncOperation(&FrontendWarZ::as_MoveAllItemsThread, &FrontendWarZ::OnMoveAllItemsSucessfully);
}

unsigned int WINAPI FrontendWarZ::as_MoveAllItemsThread(void* in_data)
{
	r3dThreadAutoInstallCrashHelper crashHelper;
	FrontendWarZ* This = (FrontendWarZ*)in_data;
	
	This->DelayServerRequest();

	int BackpackSlot = 0;
	int Quantity = 0;
	int apiCode = 0;
	const wiCharDataFull& slot = gUserProfile.ProfileData.ArmorySlots[gUserProfile.SelectedCharID];
	for(int i=8; i < slot.BackpackSize; ++i)
	{
		const wiInventoryItem& wi = slot.Items[i];
		if(wi.itemID > 0)
		{
			BackpackSlot = i;
			Quantity = wi.quantity;
			apiCode = gUserProfile.ApiBackpackToInventory(BackpackSlot, Quantity);
		}
	}

	if(apiCode != 0)
	{
		if(apiCode == 7)
		{
			This->SetAsyncError(0, gLangMngr.getString("GameSessionHasNotClosedYet"));
		}
		else if(apiCode == 9)
		{
			This->SetAsyncError(0, gLangMngr.getString("InGameUI_ErrorMsg_NoInventorySpace"));
		}
		else if(apiCode == 6)
		{
			return 1; //This function was made for 1 by 1 item to inventory, we're trying something different here, so, skip this error, it will make no difference, item will be moved to inventory anyway.
		}
		else
		{
			This->SetAsyncError(apiCode, gLangMngr.getString("BackpackToInventoryFail"));
		}
		return 0;
	}

	return 1;
}

void FrontendWarZ::OnMoveAllItemsSucessfully()
{
	Scaleform::GFx::Value var[8];
	gfxMovie.Invoke("_root.api.clearBackpack", "");
	int	slot = gUserProfile.SelectedCharID;

	addBackpackItems(gUserProfile.ProfileData.ArmorySlots[slot], slot);

	updateInventoryAndSkillItems();

	updateSurvivorTotalWeight(slot);

	gfxMovie.Invoke("_root.api.hideInfoMsg", "");
	gfxMovie.Invoke("_root.api.backpackToInventorySuccess", "");
	return;
}

IN FrontEndWarZ.h
AFTER THIS
void eventOpenURL(r3dScaleformMovie* pMovie, const Scaleform::GFx::Value* args, unsigned argCount);

ADD THIS
void eventMoveAllItems(r3dScaleformMovie* pMovie, const Scaleform::GFx::Value* args, unsigned argCount);

AFTER THIS
void		OnRequestGCTransactionSuccess();

ADD THIS
static unsigned int WINAPI as_MoveAllItemsThread(void* in_data);
void		OnMoveAllItemsSucessfully();