S!
More fiddling with conf.ini and noted a thing that are connected to the "blue hue" when firing guns or being near explosions, so a lighting effect. TexVertexArrays and TexVertexArraysEXT are the key here. If enabling the first one and leaving the second one disabled = blue hue. Same if both enabled. But if the latter is enabled and first one not = no blue hue. So does the setting mean that the first setting is game's internal set of them and the EXT done by hardware? Just a guess, but set it so now.
Also..for less stutter and resuming having the 9.10 atioglxx.dll in IL-2 I can recommend in CCC the following settings..
1) Anisotropic Filtering. IL-2 seems to use 2x only and leaving it to application controlled does no harm nor does overriding it give any fps gain.
2) AntiAliasing. I have settled with 4x BOX as running 1920x1200. Very few jaggies and online you do not have time t ostare if there is a minute jagged edge somewhere

3) AA Mode. Set at Performance, using Adaptive or Super-Sampling cause stutter, SS most noticeably.
4) Texture Filtering. High quality, goes without saying.
5) VSync. On unless application tells otherwise. No tearing etc. when using TrackIR.
6) Triple buffering. I have it on, no clear advantage or disadvantage if not using it.
Will post current working conf.ini later on, still at work..