1) Yes, the 2 servers can co-exist in 1 single domain.
2) No, there would be no conflict between 2 machines. However users might
have to type \\computer1\sharefolder1 and \\computer2\sharefolder1 to access
files on different machines. Unless you are using DFS to share out the
In brief, you can simply go ahead and install SBS2003 as another DC on your
In long, you need to tell us whether you are using AD on Win2003, and
whether you want to keep the existing Win2003 as a DC or just a member