[Zope] how to install zope eggs

hi there, I would like to install an egg that depends on zope eggs installed (i18ndude) this of course can easily be done with easy_install. however afterwards non of my zope installations (and I have a number of them on the system) are working anymore because python is picking up some parts of the installed zope eggs. with no-deps I can avoid installing the zope eggs but the i18ndude does not work anymore. how can I install zope eggs (or i18ndude that is) such that my zope installations still work? or phrased differently: how can I install the zope eggs into a given zope instance? thanks robert