I would not call editing .txt files "hacking"
ANd whats important editing "eqstr_us" does absolutly NOTHING to help alter the name of the zone in the middle of the screen. That is in the .exe file which needs to be hacked.
Editing eqstr_us.txt is no diffirent that chaging your spell file, since regadless of what you put into eqstr_us file it will not impact the gameplay/server/other players in anyway