Ok, since after reading this post, i decided i would try and see if i could fix this since i do hate the flickering and I have stumbled upon a solution.
1st: I installed the game on my laptop to experiment so i was sure i didnt mess up my saves on my main rig.
2: My laptop screen is 1080p (1920x1080)
With the widescreen mod set at 1920x1080 and all other mods installed, i got the flickering.
3: So I re-installed the widescreen mod and chose one resolution lower which is 1280x720.
4: Then i re-nstalled GhostDogs UI mod so it adjusted for my new resolution.
RESULT: No more flicker
So I decided to try it on my main rig which was set to 1920x1200
1: Re-installed the widescreen mod and chose 1680x1050
2: re-installed Ghostdogs UI mod
RESULT: No more flickering
So try using a resolution that is slightly less than your monitors default resolution and see if it works for you.
(dont forget to choose to update save files when re-installing the widescreen mod)
Post edited July 17, 2012 by mtdew332