Once your Apple TV2 is jailbroken, installing nitoTV app is very simple. All you have to do is to follow the below mentioned steps. This method is for Mac users only. Windows users will have to wait a little longer until and unless Snowbreeze 2.1 is released (released now).
As you know running an app on AppleTV 2G requires that your device must be jailbreaked. Head over to this post for complete step by step guide to jailbreak Apple TV with Pwnage Tool and after your TV is jailbroken, come back to this post for further steps.
Step 1: SSH into Apple TV2. If you asked for IP, use appletv.local and it will work in most cases.
Step 2: Type the password “alpine”. Enter the new password if you haven’t already set one.
Step 3: Type: echo “deb http://apt.awkwardtv.org ./” > /etc/apt/sources.list.d/awkwardtv.list
Step 4: Type: apt-get update
Step 5: Type: apt-get install com.nito.nitoTV
Step 6: Type: killall Lowtide
Enjoy nitoTV app running on your Apple TV 2G which currently has weather and RSS functionality.