[Opensource] eContent evaluation

[Lirian Ostrovica]

Hi,

I have eContent2-01 installed under Expresso 4-02 (thanks to this list).
When I say installed, to my opinion that means having the eContent
schema registered, and being able to navigate through eContent menus, am
I right ??
I have created a new table of contents, and trying to fill it with
categories and resources.
In  Resources>Edit/Create Resources  when I click 'New' I get 404:

The requested resource
(/expresso/components/econtent/media-style/editor.jsp) is not available

and indeed no 'media-style' subdirectory exists.
Also when I click 'Views' on the main eContent menu I get 500:

java.lang.NoSuchMethodError
 at
com.jcorporate.econtent.controller.ContentsState.addDropDowns(ContentsState.java:910)

can someone tell me what is going on ?
thank you

Lirian
Ps to eContent/Expresso guys:
As eContent is a commercial product, there is no way I will spent hours
looking at the source code to find answers to my questions.
(documentation like
http://www.jcorporate.com/expresso/components/econtent/doc/installation.html
is quite near to  obsolete)
Please let me know, if it is not appropriate to send eContent questions
to this list, but I myself don't know a better place.