SoftTH (fullscreen, DX9 x86). Edit %USERPROFILE%\Documents\My Games\RedOrchestra2\ROGame\ Config\ROEngine.ini. ResX & ResY yours.

(PLP screenshot with bezel effect)

1. Game looks good. Hor+ & FOV looks proper (both aim & casual view). HUD is perfect (except toggle Command widget is stretched). FMV cutscenes are single-screen. Some in-game text is stretched. Main menu's background art is stretched.
2. Optional FOV (not needed):
A. Weak: in-game FOV slider.
B. Strong: edit \ROGame.ini PlayerFOV, up to 90.
3. Mouse Clipping Fix (optional, if using mouse & OS GUI interferes):
A. Both the problem & workaround are usable but annoying, pick your poison.
B. Once game settings are to your liking, PrimaryLock utility limits mouse movement (instructions in guide/parent page).
C. But utility disallows mouse access to menus' sides (& the glowing navigation effect is gone).
D. So use keyboard sequences instead, works like this:
i. Main & Pause menus: Up/down arrows, it doesn't roll, press Enter to select.
ii. Campaign Select menu: click text (e.g. Continue Campaign), press Tab 3x, then Enter (e.g. starts mission).
iii. At Mission Report screen (upon mission completion), press Esc & Leave Mission.
iv. Less-used submenus (e.g. graphics, stats): Use Tab key to access them. On first Tab-press, focus moves to Exit/Back. Then each subsequent Tab moves you through the submenus, counter-clockwise. Press Enter to select a submenu; mouse wheel to scroll; Esc for back to main menu.
v. Workaround for Multi-player menu & replaying Axis Campaign. These are complex/impossible with keyboard, so quit both game & PrimaryLock. Select PrimaryLock exe (but don't run it). Start game, use problem menu. Then Alt+Tab (game image pauses), Enter (starts the selected PrimaryLock). Then Alt_x2+Tab gets you back to game.

(aim view)

(best of tank's views)

(comparison. Ignore the men as they're moving)


View guide for general help with the instructions.