[Zope] help! uploading images..

[julian@zereau.net]

I need to let customers

1) upload a replacement for an image that already exists in the zope tree

2) upload a new image which was not already in the zope tree, and add it to the
"images" folder

How can I do this? I do not want to simply give the customer write-access to
the images folder as this would be both too complex for them, and too insecure.
I would prefer to be able to do this from within a form of my own making.

---
Julian Morrison
Programmer (Zereau Ltd)