changing of Sendmail to QMAIL

[tigre21]

Hello Managers...
I need change my sendmail MTA to QMAIL,
Do you have the information step by step?
Please....
I'm looking www.es.qmail.org and www.qmail.org... but it confusion me 
I don't understand.... 

Please... Somebody have the step ....
I need install it on a Digital-Alpha with Tru64 4.0F ... The Qmail
will run very  good?

The qmail no need the file /etc/passwd ?....  Do it use a database?
why?

Thanks 



P.D.
Somebody speak spanish