I think he's asking "how do I turn this on", and that is something of a confusion the the ACS Classic version that OpenACS is based on. Some bit rot, or client-site work that never fully made it in, is my recollection (it has been awhile since I've worked with it in ACS Classic).
Check the parameters for stuff like "There are at least some international (i.e. non-US) users". See if these are referenced in register/*.tcl and pvt/*.tcl. See if the references are consistent.
Or just try turning on the relevant parameters on in your paramters/yoursite.tcl file and see how far you get.
My recollection is that you don't get what you want exactly, with ACS Classic or the faithful OpenACS port, but fixing it wouldn't be hard and if I'm right, you could contribute the fixes to us.
