[Dovecot] Advice on converting from Mbox to Maildir?

Does anyone have advice or pointers on good documentation on how to convert a system from using the Mbox format to using Maildir?

I recently upgraded to Fedora Core 2 from Fedora Core 1 and discovered that UW-IMAP was gone. So I switched over to using Dovecot. So far so good.

But I would like to convert my system to start using the Maildir format.

How easy is this to accomplish?

Can I keep my Inbox /var/spool/mail/user_name as an mbox format and have my other folders as Maildir?

What would I have to change for Sendmail to make it use Maildir for the Inbox?

Can procmail support Maildir?

Any pointers or help would be much appreciated?

John