here s an aditional info from our technical Admin Sgt. Garcia/France:
Good morning all comrades!

This method is running fine but for writing the new master server IP in your Windows HOSTS file you DO (must) change security options about your Windows HOSTS file (about "pc-account_users") about Windows 8 and 8.1 (32-bit or 64-bit) and often on Windows Vista; Windows 7.
You DO (must) give "FULL CONTROL" about your Windows HOSTS file (about your "pc-account_users") for writing in it!
In reality security options (by default) is a function of security options that you choose when you installed your Windows OS.

Note: After save ->restart your PC->Do a test by running BF1942
After by security do not forget to restore security by default about your Windows HOSTS file!
Please look at my ultra-detailed tutorial with many pictures in 2 languages:
http://www.somua.com/forum/topic/22617- ... ows-hosts/
Best regard and enjoy!
sgt_garcia
http://www.pixel-fighter.com/modules.ph ... pic&t=2031
Hope this little HowTo´s help a bit for the players to switch easier to new Master Server
Greetz
Grabbi