Crossfire Mod - Widescreen and Windowed Mode issue

Small little issue I need help with. I have installed the crossfire 2.0 mod and was able to play at 2560x1080 with ENB and all other bells and whistles but ... I sometimes like to play windowed vice full screen. I can use alt-enter to enter windowed mode but the window is full screen resolution so it is slightly lager with the OS window. Additionally, I am not able to resize the window to make it fit. Is there a way to play windowed at a lower resolution than full screen? I also noticed that I can't view the intro videos in full screen but can in windowed mode, no clue on that one.