[Zope] Programmatically adding and deleting indexes in a ZCatalog

Hi, I've got one of these ObjectManager/ZCatalog derived ZClasses, and I'm wanting to add some code to my _add method to delete some of the default indexes and add some new ones. How would I go about doing this? -- Benno Rice "No, no. We're *sweet* and XNFP Aries Dark Subculture- *innocent* evil bastards." friendly Internet Geek benno@netizen.com.au "Defend your joy"