i download the 1.2.1 full, clicked on the installing thing, clicked yes on the terms of use, checked all the things like the mp3 files, esf, music etc, than when it gets to the part to choose ur directory it automatically chooses c:\program files\valve\steam\steamapps\XXXXX\half-life, than the install tab is gray meaning i cant click on it, i tryed other folders on steam but it still doesnt work... and yes i do have steam running when i was trying to install