After my question regarding how to move a 2003 to 2008 R2 AD was answered, I tried to perform it.
DCPromo runs fine.
After a big fight I managed to get the SYSVOL and NETLOGON folders automatically replicated.
Needed to do firs a non-authoritative and then autoritative recovery.
I have transferred FSMO roles from the original 2003 server to 2008 new server using MMC console.
There was an issue with transferring the Schema Master role, so I've used ntdsutil for that.
When shutting down the 2003 server and leaving only 2008 active, we are unable to perform any logon - as it says that there are no logon servers available. Despite the above info.
Since this was not working, I have powered back the 2003.
Had to transfer the FSMOS roles back in order for the kix script to mount the shared drives folder.
However, I cannot transfer back the FSMO role of Schema Master back to 2003, as it says that 2008 is uncontactable, which makes no sense.
Maybe you can have an idea what to check for?
I do believe it might be related to the DNS replication, as this was the first big issue.
Maybe is just easier to reload the server and recriate the AD by hand?