I worked on a similar thing a while ago, I don't know if this will help but it may be worth a look.
There are a series of videos on the archived documentation on the following page:
Go to Archived Documentation and under Solution Recipies
Modifying Registration (Interactive Tutorial)
Changing the Update Profile (Interactive Tutorial)
Creating a New Password page (Interactive Tutorial)
Updating Send Password (Interactive Tutorial)
I am pretty sure you have to manually create the page and add the behaviours to it.
I hope this helps
Check out the videos, I worked through them ok some time ago, the password seems to be being sent as an encrypted format, not sure why, but I will post a new thread on this and hopefuly get a solution soon.