Upgrading to OS X 10.4.4 broke my previous hacked installation of Front Row, but it turns out that only a reinstall is needed.
Check out Andrew Escobar’s tutorial to install it. It involves a bit of deep-rooted changing (the Bezel Services framework, for one), but it seems to be ok. I had to log out one final time (bringing the total to three times since starting the install) in order to watch a DVD. Everything seems to be peachy, as it should. You are effectively tricking your machine into thinking it has Front Row natively installed. There is no thrown-together hack; you actually download the install package from Apple and activate it through Escobar’s Enabler.
Check it out. Front Row is a really neat app.