First of all: I'm all new to this CMS and I just downloaded and installed today as I'm testing different systems to find one that will meet my needs.

The question:
I get no content in the centerbox area no matter what I do, it's just completely blank. I made a few bogus articles, news of week etc. and try to show them there just to get a reaction - nothing.

I might not understand the logic in this system, so I hope someone will take the time and explain how to get started - I think if I get the first piece of text there I will figure out the rest.

I appreciate your help!

Did you activate the article index centerbox for displaying the articles?
Cause the articles will only displayed when you create such a centerbox or the new article centerbox.
Cause you decide the position and module for dispplaying the centerbox.
So OPN will not automatical display any content in the center area.

Got a blank center when install finished and also thie error when installing modules

ERROR [2] Cannot modify header information - headers already sent by (output started at /export/htdocs/opn2/html/include/opndb-errorhandler.php:53)
FOUND IN [class/class.opnsession.php]
FOUND AT 263