Installing Harry Potter for Kinect on a modded Xbox 360 like JTAG RGH isn't much different from installing any other game. However, due to the nature of JTAG and RGH, users have more flexibility in terms of where they source their games and how they manage their console. Here are the basic steps:

Installation of Harry Potter for Kinect on JTAG/RGH is straightforward using the GOD method. No special patches are required beyond standard DashLaunch settings to block LIVE. Kinect functionality remains fully intact. Allow ~10 minutes for the conversion + transfer process.