Migrating to Rails 1.2 and user_engine

My app is running on Rails 1.1.6 but is using user_engine and
login_engine, which are, apparently, dead:
(makes one feel a slightly abandoned). For now, as long as i use
user_engine and login_engine, it seems I'm tied to rails 1.1.6. Well,
I don't want to be tied to 1.1.6 forever and I'd like to migrate to
1.2. How are others handling this? Are you just freezing your apps
to 1.1.6 for now? Are you re-writing the user and login engine
stuff? Any advice would be greately appreciated.