[Samba] samba / openldap upgrade

[pmorvan at laita.fr]

Hi, 

I run a samba 3.0.10-1.4E.2 with openldap 2.2.13 on the same server (red 
hat 4) 
I would like to upgrade both to be able to join win7 machine to my domain 
(and because openldap crash sometimes..). 

I have no idea how to do that and I don't know if it takes lot of time. 
This server is critical and can't be stop like that. 
I would like to upgrade to the latest versions. 

Can someone help me or guide me ? 

Thanks.