It's relatively easy. Since you are already up and running, follow the part to install mono:
and follow the part to install gdebi and the part to update the rpi.
6) Install needed utilities/update system
sudo apt-get install gdebi-core rpi-update
sudo apt-get update
sudo apt-get upgrade
sudo rpi-update
7) Set up SSL certificates
sudo apt-get install mono-complete
sudo apt-get dist-upgrade
sudo certmgr -ssl smtps://smtp.mail.yahoo.com:465
sudo certmgr -ssl smtps://smtp.gmail.com:465
confirm setup:
echo "" | openssl s_client -tls1 -showcerts -connect smtp.mail.yahoo.com:465
*** yahoo and most likely google require an app specific password ***
reboot at this point

Install HG
sudo wget
http://sourceforge.net/projects/homegenie/files/homegenie-beta_1.1.r525_all.deb sudo gdebi homegenie-beta_1.1.r500_all.deb
ln -s /usr/local/bin/homegenie/log /home/pi/.
I updated the file name to reflect the newer version.
Now I realize I didn't do the last line "ln -s...