[TYPO3-ttnews] Default category for news in one particular sysfolder

[typo3.netfielders.de]

Hello all,

I have a site on which I want to install a "News" and an "Article" 
system (typo3 3.8.1, TV0.4 tt_news2.2.24).

Basically I thought that using tt_news with 2 different categories (News 
and Articles) should do the trick.
I made 2 sysfolders, one for the News and one for the Articles in which 
I want to place the news items.
Obviously every news item on those pages should by default have the 
right category selected.

Does anyone know how I can have those sysfolder set the newscategory to 
a default value?

or alternatively,
How I could solve this problem differently?

Thanks in advance,

Patrick Scholman