First, git it!
git clone git://github.com/choang/vim-config.git ~/.vim
Once cloned, you need to update submodules
cd ~/.vim git submodule init git submodule update
Create a symlink for your vimrc
ln -s ~/.vim/vimrc ~/.vimrc
cd ~/vim
git submodule add <git-repo> bundle/<plugin>
For example
git submodule add git://github.com/tpope/vim-endwise.git bundle/endwise