Should really be in the mapping section shouldn't it :S
Anyway, in the run section (if you have it all setup properly) *recalls of the top of his head* you need to put the command line parameters in the text box in the run window, something along the lines of "-console -game esf" (without the "s). I could probably give you more help when I get back home but at the moment i'm in my school waiting to do my next GCSE for the day :x