[TYPO3-shop] Category and Search

[Christopher Löer]

Hey guys,

I have two problems.
Every product category should be  menu point: I have one sysfolder. In it
are all products and categories.
I configurated the  menu point manuely (as sites). The content of the site
is the Plugin Product: list.
The Problem: All products of all categories are shown. I know that I can
open  such a site with the enclosed parameter "&tx_ttproducts_pi1[cat]=3" in
the URL. (3 stands for the category number) How can I enter this parameter
in Typo3?
Second problem: The search of a product works. I can add a quantity to the
basket but I can't open the product detailed.

Thanks in advanced

Christopher Löer