[Zope-dev] ZCatalog and Huge Customized Objects in ZODB

Is it possible to store lots of huge objects, like 2-3 MB in size each, in ZODB and catalog them for easy searching? Can I catalog special properties of custom objects and skip others? Are there any limitations to ZCatalog and the amount of stuff to index, before the speed is affected? If somebody has pointers on how to store custom python-objects in ZODB and make them ZCatalog-aware or somehow work with the ZCatalog, I`d be most grateful. Thanks. Thomas