Install Mono

1. go to http://www.mono-project.com/downloads/ and download the current version of mono
2. Install mono. I copied the file to /usr/local/src:
   cp -p mono-1.0.4.tar.gz /usr/local/src/
   cd /usr/local/src
   tar xvzf mono-1.0.4.tar.gz
3. Compile and install mono:
   cd /usr/local/src/mono-1.0.4
   ./configure --prefix=/usr
   make
   make install
4. Verify that mono is installed:
   mono
   You should see the mono usage displayed.