[Zope] Simple ZClass Question

[Gerald Gutierrez]

Using Zope 2.3.0b2, I've found that if I create a ZClass with "Include 
standard Zope persistent object base classes" enabled, I can instantiate 
the ZClass right away. If I don't have it enabled, I can still create the 
ZClass, but instantiating it gives me the following error:

Zope has encountered an error while publishing this resource.
Error Type: AttributeError
Error Value: _setId

I understand the difference between checking and not checking the option, 
but unfortunately, I'm just starting with Zope in general so this error is 
not obvious to me. Is this correct behaviour?

Also, I'm interested in whether Zope can be used to write web games, e.g. 
along the lines of Blacknova.net's use of PHP. Are there any examples of 
Zope games on the web?

Thanks.


Gerald.