Motherhamster source is stored in a subversion repository, with anonymous read-only access. You will most likely want to get it into your "site-packages" directory for your python installation. If you don't have python, check out installing dependencies.
If you have the command-line subversion client installed, you probably want to execute this from the site-packages directory:
svn checkout http://motherhamster.org/source/motherhamster motherhamster
The code is available under the MIT License