[Zope] Znolk

Hi all, I have installed znolk on my zope site (and have mysql setup also), not being fluent with DB, I have problems setting up that product. If I use the znolk wizard (I just use 1 table) without any special options, it works no problem. But when I want to setup a "multiselect" select field with a drop down, I can't find the proper settings in the extended info. All I want is to be able to have 3 choices for the entry of a field. No lookup to another table. How can that be done? do you have a concrete example, I could not make use of the supplied instructions. Regards, Francois