unfubar_geminstaller.sh

# 'gem update --system' is broken in Rubygems 1.2.0, so if you have 1.2.0, run this
sudo gem install rubygems-update && sudo update_rubygems && sudo gem uninstall geminstaller -v 0.4.5; sudo gem install geminstaller -v 0.4.5

# OR if you have an older rubygems version, like 1.0.1, you should install from a tarball like this, because the above method hangs due to cache performance problems
wget http://rubyforge.org/frs/download.php/45905/rubygems-1.3.1.tgz
tar -zxvf rubygems-1.3.1.tgz
cd rubygems-1.3.1
sudo ruby setup.rb
sudo gem uninstall geminstaller -v 0.4.5; sudo gem install geminstaller -v 0.4.5