You need two accounts because you can have only a sinlge logon per account.
Most games have a client lancher, this is the the game splash screen you get when you run the game with the default game icon.
So, have the game ready to run in window mode and run the game like you always do and log on.
Now go to the root install folder of Archlord and find the file called "alefclient.exe" double click this and wait a few seconds and you should get another client running. Log on with your second account and your done. You are not double logging Archlord, in a sort of fachion since you do need two account to do this double log on.






