[Zope] Xron, ZScheduler and Zope 2.4

Does anyone have Xron or ZScheduler working with 2.4? These apparently need to be patched to work with 2.4. I tried some instructions that have been suggested (import DateTime fix, etc.) and they have gotten me close to having it work but it still doesn't work. What would be most useful is to have someone send a patched working version of one of these that they might have on hand. Note, I am not a Zope developer or Python guru, so anything less than very specific instructions are of limited assistance. Thanks P. Johnson