There is a zip.vim script (by Charles E Campbell, Jr) that is very handy for modifying zipped files directly, but it can get difficult when you have long file names and multiple directories. Sure, using the mod all the time probably isn't the smartest thing to do, but it works. And this will colorize the output a little!

Download and install this script where the other filetype scripts are (on my system, /usr/share/vim/vim70/syntax/), and then add one line to your .vimrc file:

autocmd * *.zip setlocal filetype=zip

Sorry for naming this script the same, but it seemed like the best way to make this change....