Downloading the archive
The simplest way to get EasyProject is to download the archive from RubyForge.
Go to the Files page of the EasyProject project page and download the latest version.
Cutting Edge Code - Subversion
If you're a real "cutting edge" type, you can install the code base from the subversion repository. The command to execute is:
svn checkout svn://rubyforge.org/var/svn/easyproj
This will give you the latest and greatest code. I try not to commit anything that doesn't work, but as with all development code, I can't guarantee anything.
One nice thing about using the subversion method is that updating an installed version is very easy. You simply have to run the subversion "update" command in the directory.
svn up