Just use the bootstrap script to update the repos, copy all files to
~/.vim, symlink rc files and compile and plugins that require native
extensions (like command-t).
This assumes you're using Vim 7.3. OS X 10.6 ships with Vim 7.2, but you can just use MacVim by symlinking to the mvim binary.
Plugins as submodules
Any additional configurations will be loaded from