Veewee considerably simplifies the process of creating base distribution images for use with Vagrant, but unfortunately you have to choose between using the easy to install gem (which comes with horribly out of date basebox templates), or install the latest version from source, which unfortunately uses rvm in a pretty repugnant way.
So, if you want to use veewee to setup a new amd64 Precise Pangolin basebox for vagrant, you either have to pull the latest veewee sources from github, or download the most recent releases templates and copy them over into your veewee gem folder.
This is where veewee-templates-update steps in, it automates that latter step (downloading and installing just the updated templates) for you.
Installation is simple:
$ gem install veewee-templates-update
Then, just run the updater:
$ veewee-templates-update
> Veewee: /home/aaron/.rvm/gems/ruby-1.9.3-p194/gems/veewee-0.2.3
> Downloading: https://github.com/jedi4ever/veewee/tarball/master
> Extracting: CentOS-4.8-i386 CentOS-5.5-i386-netboot CentOS-5.5-x86_64-netboot
> ...
$ vagrant basebox define precise-amd64 ubuntu-12.04-server-amd64
> ...
> (profit)