Don't think addressbook was fully ported. At least not for PG anyway. Check out these threads
https://openacs.org/bboard/q-and-a-fetch-msg.tcl?msg_id=0003Cu&topic_id=12&topic=OpenACS%204%2e0%20Design and
https://openacs.org/bboard/q-and-a-fetch-msg.tcl?msg_id=0004Go&topic_id=11&topic=OpenACS
