May be useful for someone:
/etc/httpd/conf/httpd.conf
--------------------------
Apache configuration, with reference to all virtual hosts
/var/spool/
-----------
Many settings
/etc/proftpd/
-------------
Settings (accounts, usernames, password) of ProFTPd
/var/lib/mysql/
---------------
All MySQL configuration, including login information
/etc/vmail/
/etc/valiases/
-----------------
mail accounts
/etc/passwd
/etc/shadow
/etc/group
-----------
users accounts
/etc/named.conf
---------------
nameserver settings
/etc/localdomains
/etc/userdomains
/etc/trueuserdomains
/etc/domainalias
--------------------
domains config
/etc/quota.conf
---------------
quotas config
/etc/exim/authtab
-----------------
EXIM (SMTP Server) settings
===========
now for cpanel:
===========
/var/cpanel/
------------
a lot of settings from cpanel
/etc/named/
------------
configs about name server
/usr/local/frontpage
--------------------
don't know exactly, but seens to be important...
=========
well... that's it
i'd appreciate if you have some hints of other important files
my idea was to, when needing the recover server, just copy then and everything would be working...
but still didn't got it...
i'm still having to add all account manually on WHM (cpanel) and it is very problematic because:
1) longer downtime
2) very boring job (i host 20 domains)
-- Dave