[Zope] ZClasses: How to change the baseclasses?

Ok, the Subject says it all. (Basically, how do I add a Python mixin class as an afterthought? *wonder*) Andreas -- Andreas Kostyrka | andreas@mtg.co.at phone: +43/1/7070750 | phone: +43/676/4091256 MTG Handelsges.m.b.H. | fax: +43/1/7065299 Raiffeisenstr. 16/9 | 2320 Zwoelfaxing AUSTRIA