[TYPO3-shop] Setting up pages as categories - how to create menu?

[Simon]

Hi

I'm setting up tt_products. tt_products are configured with 
PageAsCategory = 2

But how do I get the menu to point correctly to my categories?
Do I need the nsb2catmenu like if I was using a sysfolder for all my 
products (how do I configure nsb2catmenu in that case?) or is it 
possible to construct a regular HMENU/TMENU?

My problem is that by using the latter solution, my links do not set the 
  proper GPvars

Merry XMAS and a happy new year

Simon