Hi,
take a look at the Plugin Page (in this Forum is under thirdparty, i think)
there is a step-by-step howto integrate a Password changer.
Maybe u will take this, or you study the page and create your own...
I createt my own (the password changer i took 1:1) Vacation Assistant,
is in this Forum too...
Sorry for my worse English, i am from Germany
Greetings
ZX