First go into program files then to these: Steam , SteamApps, *insert your steam email here*.com , Half-life , esf, mp3, once inside the mp3 folder click the playlist editor exe. Then click file open and find your play list you made in winamp. Once you open it i'll show on the right. To save this playslist to the ingame mp3 player click on file save as and hit the play list file then save. If its done right you'll see all your play list songs in the file. You must go to options when you are playing esf and I blieve the button is customize to find the option to enable in game mp3 player. Once your done with all this you can see the mp3 player by pressing f8 while in game. Enjoy. :tired: