any chance you could post the link to the 1c russian site with the settings mate?
last night after installing the game, leaving the settings at med and e-filter on i did the same mission, ran very well quite suprisingly on my system, except when i got right up close to the bombers, and it got a bit stuttery, i put this down to the engine flame problem that was quoted in an earlier thread (not sure if this was fixed or not). This morning after the patch i did the same mission with the filter off, ran quite nicelly
only a tiny bit of stuttering from time to time once up close, but id now put that down to my system being a middle of the run system
overall im impressed so far, waiting to see how the update patches come along and improve it over time
btw, my sys specs - just as an example that the system dont need to be great to run this:
Amd 6000+ x64 athlon dual core
6GB ddr2 xms 2 ram
gts250 1gb gddr3 vid card
Win7 32bit