It`s called FSAutoStart and can be found at
What it does is let you tell it what processes and other programs you want switched off before playing your game of choice. And even though the name suggests it is made for MS Flight Sim, it works just as good with IL2/PF.
Once configured, you press start, all desired is shut down, it then procedes to defragment your RAM and starts the game.
Then when you`re through playing, everything you turned off is started again. Of course this requires the program to be running in the background, but it`s a good tradeoff.
What FSAutoStart does, you can of course do manually in several ways. But I for one am lazy.