samba - Jan 2002 - upgrade from ver 2.0.7 to ver. 2.2.2

Hi all,

does someone know how 
upgrade from 2.0.7 to 2.2.2?
What about smbpasswd, MACHINE.SID and
secret.tdb. Everything about my installation is in
/op/samba.

Thanks in advance

Giuseppe De Nadai