I can confirm that "Dirt 2" does not start with FARR in the background. Before starting a high performance game like dirt I close all unneccessary processes via GameBooster which is able to stop processes and restart them after switching back to "normal mode". But I never thought that FARR is the program causing the crashes of "Dirt 2". After adding FARR to the list of processes to be closed for "gaming mode" all is fine.

I use WinXP Home SP3 (32 Bit)