[Zope] Best way to have special objects in my products produc list?

[Lennart Regebro]

I'm making a product that is going to have sub products that doesn't make
sense anywhere else. These subproducts should therefore not appear in normal
folders.

There seems to be several ways to achievie this, what do YOU think are the
best way, and why?

I'm still using Zope 2.3.4, and I'm subclassing a ZCatalog, and therefore
using the standard ObjectManager.

Any input appreciated.