Operation Flashpoint Dragon Rising: 4K (3840x2160) resolution tweak

As I've got a 4K+ monitor, I tried to change the OFDR resolution higher than 1280x720. Though default settings didn't allow the higher resolution, it worked by editing a config file. As you can see in this video, resolution of 3840x2160 has been achieved. But it's hard to upload and watch such a big file, I captured the screen with resolution of 1920x1080. Head-UP-Display size doesn't change and it's too small. Though OFDR is 2009 made old game, you can get full immersion with 4K monitor.
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As a player, it's nice to play with high resolution. But it distorts the game balance. I mean, for example, you can snipe faraway spotters easily as you can see in this video. It's not what creators assumed.
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I heard this modification method works only for DVD edition with no patch.
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You can download the mission from here for free: www.moddb.com/members/0perator/downloads
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