ZC 1.5.6a

So, as I am trying to redesign homepage... I browse forum and found out that there is a link that can make the top level categories to be displayed as category page by attached the following index.php parameters to the end of the website domain.

Code:
/cart/index.php?main_page=index&cPath=0
The result of that page is looked like this image in this link...
https://i.imgur.com/fahyze8.png

However, it seems to be that I cannot modify this page in anyway, since it is generated due to parameter of category = 0, which is not accessible on admin page.
Also, this page listed both types of "product types," which is I do NOT wanted to listed in this manner as I used the "document product type" as "rental categories."

So I am start to wonder if it is possible to set parameters so that I can make 2 separate (EZ-)pages where one page for product categories (`product_types`.`type_id` = 1) and another page for document categories (here used as "rental categories" ... `product_types`.`type_id` = 3), while also able to add texts on the top of those pages.

... or I have to make new page and files and customized like in "Define Page Editor?"