Yeah, well, I do have the same problem, except that I unzipped everything, put it into a folder and then put it in the right spot. Still doesn`t work, though. I think the texture pack I am trying to install should work for 1.4 ( The Brutallama`s Brutal Vanilla Revamp), but I can`t be sure about that. I did install one small texture pack in 1.4 before and didn`t have any further issues.
edit: Nevermind, turns out that the version of the texture paack was just outdated.