its no problem, you start first your 1st server as normal.
with both logon and world. (logon from this pack will be used for both realms)

Then for the other realm, you go in your configs, an set up as normal to your db,
BUT you must change some ports to be able to have more than 1 realm.

so in the second realm: open world config,
WorldServerPort = "8128"> <--- type 8128 instead of 8129 as the first realm has
and save world config.



and then open realms config,
Address = "84.202.15.64:8128" <---- type 8128 here instead of 8129 as in first realm and save realms config.


Thats it, when you start world from your second pack, it will
log into same logon as your main.

It will use same accounts, but you must have 2 character tables.