As the admin of the site this thread poster got this from, I'll state it does not contain any virus's/trojan's and does currently work for Left 4 Dead, as its Material files only.
Simply replace the materials in the original location with these materials that allow for "wallhacks". Simple.
only three people posted so that doesnt mean just because campstaff said it doesnt mean it works
i wont test it cuz the VIRUS SCAN clearly says theres virus and i dont have a good enough anti virus thing for my pc
cheats u have to type in sv_Cheats 1, hack u dont have to, and hack like seeing enemy through wall when ur survivor on vs mode or something of that sort.