#1.A. Fullscreen: SoftTH (DX9 x86). Edit %LOCALAPPDATA%\id Software\WolfSP\base\wolf.cfg. r_customerHeight & ...Width yours, r_letterBoxedHeight & ...Width yours, r_fullscreen "1", r_mode "-1". #1.B. OR Borderless: Edit wolf.cfg (same folder). r_customHeight & ...Width (yours no border *), r_fullscreen "0", r_mode "-1".
#2. Widescreen Fixer (Aspect ratio not auto-detect. Enter Custom 16x5, or calc exact for proper).
#3. In-game, Fullscreen works as-is. But for borderless, use ShiftWindow, same nums (yours + border = borderless) & to position.
(PLP screenshot with bezel effect)