First, backup your existing .vim directory:

mv ~/.vim ~/.vim-backup

And backup your configuration files:

mv ~/.vimrc ~/.vimrc-backup
mv ~/.gvimrc ~/.gvimrc-backup

Now clone this repository:

git clone git://github.com/soveran/vim-files.git ~/.vim

In your ~/.vimrc put this:

source ~/.vim/vimrc.vim

And in your ~/.gvimrc put this:

source ~/.vim/gvimrc.vim

You may want to explore the ~/.vim/config directory to see what's included and ~/.vim/config/mappings.vim to see how to use the available tools.