As you may know FrontRow 2.0 misses on important FrontRow 1.x features. Opening it without stopping the music. That is why we downgrade Frontrow to 1.x 
First get the Front Row 1.3 Update: http://www.apple.com/support/downloads/frontrow131.html and mount the Image.
Open a Terminal (Applications -> Utilities -> Terminal.app)
Backup your Front Row 2.0
sudo mv /System/Library/CoreServices/Front\ Row.app /System/Library/CoreServices/Front\ Row.app2.0
Extract the old Front Row:
cd /
zcat /Volumes/FrontRow_1.3.1/FrontRowUpdate1.3.1.pkg/Contents/Archive.pax.gz| sudo pax -r
I needed a restart for Front Row to work again.
