Hello- when the WoW realmlist file points to blizz's official realms and you use their launcher.exe, yes, one of the routines it performs is to download new content and/or "patch up"
Once you are patched up to 2.4.2, change the contents of your realmlist file to:
set realmlist realm1.wowrage.nl
Here is a link to the Connection Guide:
http://www.wowrage.nl/index.php/topic,3.0.html