How do I change the screen resolution?

From Battlefront.com

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Problem: When game launches the monitor goes black and reports a error message that says "scan frequency out of range" or similar message. Monitor may also display graphics which seem very distorted and duplicated repeatedly across the screen.

Cause/Solution #1: The game will launch in the same resolution and refresh rate that your desktop is set to but Windows can sometimes report those settings incorrectly. Check in Windows Hardware/Device Manager that your monitor is not listed as "Default Monitor". If it is, check with your monitor manufacturer for specific drivers. Windows should list your monitor with the correct make and model, if it does not, Windows will not be able to access all the refresh rates and resolutions your monitor supports.

Cause/Solution #2: With the later versions of Detonator Drivers you should be able to manually assign a refresh rate for any chosen desktop resolution. Click on Start>Settings>Control Panel>Display, then click the Settings tab and press the Advanced button. Now click on the "GeForce" or similarly named tab. Find the "refresh Rate Overrides Settings, and click the "Override refresh rates" bullet point. Now scan the list for your chosen desktop screen resolution and make sure a check is placed in the "16bit" column. It can haves checks in the 8bit column and 32bit as well if you choose. CM only runs in 16bit. In the refresh Rate column, select the current entry (most likely it will say "Default") and choose a low refresh rate, like 60Hz. Click OK twice to close the control panel. Now try and relaunch the game. You can go back and raise the refresh rate up a little at a time until you reach your monitor maximum setting.

Cause/Solution #3: If you have a GeForce video card download and install the NVRefreshTool utility which will allow you to customize the refresh rate for any resolution and bit depth (Note:CMBO always runs in 16 bit color mode). Try setting your desktop resolution to 60Hz and then launch the game. You can experiment with raising the refresh rate higher until you reach the limit of your monitor. In general, the higher the refresh rate the less the screen will appear to "flicker". Check with your monitor manufactures to locate the monitors highest support refresh rate by resolution.

You can download the NVRefreshTool utility from this webpage: http://www.guru3d.com

I can't find how to change resolution,too.
This game has no video setting menu,push ESC go desktop only.
In manual,this program set video automatically and you want to reset settings delete 'Combat Mission Bynd Ovr Prefs',and no other description.
I crawled registry key
HKEY_CURRENT_USER\Software
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Wow6432Node
and search word with "Combat Mission" and "Battle",but nothing found.

In the game main directory there is a file called "Combat Mission Bynd Ovr Prefs"; delete it and execute the game again.
The game will test your hardware and will present you a resolution+refresh rate window; if it is okay press ACCEPT otherwise press SKIP and the game will present a different combination; keep trying until you see the right one.
Don't worry if the main menu is smaller ... when the scenario starts it will be full screen.

Roberto