[Zope] How to generate an Object ID automatically

[zopist]

--2044542202.969041353315.JavaMail.nobody.samuel
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dear zopists,
im a zope newbie and i have one of those little problems ppl like me can sp=
end hours on ...
i just built my first ZClass and now im trying to automatically assign a ge=
nerated ID to an instance of this class in the -add method.
i want to generate the id because there is no unique fieldvalue available a=
nd i dont want to have the users get stuck on this point.

another problem i encountered is that when i try to add an instance in a fo=
lder i get an authentication box where no valid login is accepted

i would really much apreciate if someone could help.

Francisco (chico) Webber
--2044542202.969041353315.JavaMail.nobody.samuel--