Hi,
There is a discussion on the
"[Zope-CMF] GenericSetup import and export step registries" thread
https://mail.zope.org/pipermail/zope-cmf/2011-March/thread.html
about removing local steps registries from Products.GenericSetup, this means removing the support of import_steps.xml.
ArchGenXML still generates this old file instead of registring the import steps from a zcml file.
Maybe it's time to generate zcml import steps.
Vincent Fretin
Ecreall