How to make top category to show products instead of sub-categories?

[MKdiable]

How can I make top category to hold (or just to show) products, that are in sub-categories of that top category?

My Categories:
---
Top Category-0

Sub-Caterogy-1

Product-01

Product-02

Sub-Category-2

Product-03

Product-04

---
Now, when I click "Top Category-0" I get sub-categories list (Sub-Caterogy-1, Sub-Caterogy-2) in the main page.
Next when I click one of the "Sub-Caterogy-1" image, i get products list (Product-01, Product-02).
This is by defalt and it is ok.

But I need this:
When I click "Top Category-0" I get products list (Product-01, Product-02, Product-03, Product-04). I don't want to see "sub-categories list" in the main page, where products are listed (that list can be turned off in admin).
Next when I click one of the sub-categories (in categories box), i get products list.t-01, Product-02).

I could do it by linking my products to the "Top Category-0", but then I will break the rules, right?
https://www.zen-cart.com/tutorials/index.php?article=55
https://www.zen-cart.com/tutorials/index.php?article=56

Is there any other way?
Thank You

[numinix]

I'm looking for this solution as well...

[twelvizm]

Me three.