[sork] mysql - vpopmail - change password?

[Arnold]

First  of all sorry to ask this here, i know is not the right place:

I have Qmail, horde-imp (amazing) vpopmail, and i think that poppasswd can
change users systems passwords but still there are no support for vpopmail
users passwords, it is in development, i think again.

Vpopmail, can store users passwords in MySQL? (i'm not sure)
and then
poppasswd can change this vpopmail MySQL passwords, so the users can reset
or change their own pass in IMP?

Did anyone has a Faq or a step by step manual to set up qmail, vpopmail, imp
and anything to make users change their passwords in IMP??
I do have tried a bunch (about 12 instalations) but no luck still.

Please, forgiveme again for this kind of questions here.
And thank you for your work and your time.