Bug or lameass protection scheme in 1.7 patch?

[bugmenot]

The point is, if I use Nobilis patch I have to put the disc when I want to play the game...And I'm lazy to do that.
Tried a different approach - installed Nobilis-> patched to Nobilis 1.7.
And then copies ONLY exe from 1.7 russian version. Result=can't fight with dragon, my "troops are overrun".
If I copy ONLY exe from 1.64 russian version I can play the game perfectly, no problems with first 1 dragon fight in the game.
My guess is - this is some kind of copy protection that is implemented into 1.7 russian to prevent people to play game with russian unprotected exe. Lame.
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Honda ZB50