First of all, I've read the other threads about the subject. Confusing and not much help there.
The problem:
1. If I select data source all k2 articles, I get the no articles to display error
2. If I manually select all K2 categories module seems to work in normal mode
3. In other modes, even manually selecting the categories does not seem to help
So, currently NSP is usable only with limited options...
Joomla 2.5.1
NSP GK4 3.1
-Ville