Well after ready many other similar issues on the subject, I understood that it's trick/hard/ not possible to include an SBS2003 server on my Server2003R2 Domain.
Well I managed to include it and make it a Secondary Domain Controler.
Now after reading issues on SBS2003 with my Domain, I want to remove it.....
and there is nothing I can do, I get -> "can't access the domain!!!" which is weird because I login to this SBS box from the domain, and cannot login on this machine.
So other,than format reinstall, what can I do to make this machine a simple computer in or out of the Domain!
nomore active directory so it stops complaining and rebooting every 60 min.