Once you have installed steam, and preloaded Halflife, you first need to run half life at least once. Just open up the game abnd close it. THis will create teh nessecery game directorys that are needed. Close Steam. Now you install ESF 1.2.3b. Once this is done just load steam back up, and click on 'Play games'. Annother window should pop up and id you look under 'Third Party Games' you will should see ESF. Go PLay. Have Fun. :laff: