Interesting. My sentiments 100%. After having a fiddle with CoD, I quickly realised that it needs a year or more to mature - and I can hold off upgrading the computer. :-) + Modded IL2 now has sooooo much to offer. Just amazing; I'm back and luv'n it.

The file you showed is for the AI text that flashes on the screen which is different from the Hudlog..

I wonder what happens if you take edited hud_log files and copy them into an unmodded copy of IL-2? Probably nothing interesting.

Customise the HUD
 

There is a mod I found in Fusion Pack that allows you to change, delete HUD messages etc. I am not sure who the original author was.

Quote from readme file;
"WHAT IT DOES:

The basic idea is that you don't need all those on-screen messages telling you that you have opened the throttle or that your engine is out of fuel.

On the other hand though, disabling all those messages may be a bad idea because of our imperfect in-game cockpits, that summed to the lack of peripheral vision and the absence of 'seat-of-the-pants' sensorial input, make *some* on-screen messages necessary.

(for the record, disabling hud log messages is done in conf.ini, [game] section: set NoHudLog=1)"

Hope this is of help.