Source: http://forum.worldoftanks.com/index.php?/topic/410089-095-world-of-tanks-region-changer/

Hello everyone,

here’s a neat little thing by Dimabal100000. It allows you to change servers without having to reinstall the client (or rather install a separate one). Please note that this is NOT roaming (obviously), your account doesn’t get transferred, it only allows you to access other server clusters without installing another WoT client.

It’s simple to use – you run it, you select the location of your WoT folder and the server you want to play on (you still have to create an account on that respective server if you don’t have one).

The mod (or rather, the application) can be downloaded here.

Should you have any questions, refer them to Dimabal in his thread.