Some interesting hints and tips for running Il-2 Stutter free

FOR MULTI CORE SYSTEMS ONLY!
Open conf.ini and browse to find ;ProcessAffinityMask

Now remove the semicolon to uncomment the ProcessAffinityMask and set it to a value of 2 like this: ProcessAfinityMask=2 . This will tell the program to use the second core. The first core is heavily used by Windows thus is more appropriate to run IL2 in the Second Core.

Trust me, you'll notice an increase in game performance!

A couple of years back when MG was still releasing official core Dll's for Il-2, the readme's had a tip for Nvidia cards that gave a 10% boost in stability and performance. Over the years the tip seems to have been forgotten and the more recent Dll's have not contained any readme at all.
I found that a particular set of Dll's last year really worked for my 8800GTX. When I applied the following trick, I got a very welcome gain in performance and a stutter free game. For all those who missed it, here's what you do:

Back up your two existing dll's in your IL-2 Sturmovik 1946 folder.

Make a copy of il2_corep4.dll and rename it, il2_core.dll. Then put it in your '1946 folder, overwriting the original il2_core.dll. You should get a smoother performance and about an extra 10fps for good measure.

Easy eh?