...I need some help here

hey sup i got a problem maybe one of u can help me ok so i start up the installation for epf right i have steam and i no hwere to but it in the steam folder in halflife but its the istalltation that has a prob when i got to install it it freezes when its installing game startmp3 music up i am try to install the 1.2 full windows version of it i have tried to not install the mp3s but its has to install that one ...some help please

i had the same problem.
But now i've solved it . You need to download it again, yea i know it takes a long time if you dont have fast internet (<-- 10mb/s ).
But thats what i did so now im gonna go play it.

yep, your installer is corrupt - you need to download again