Here are link’s to the Apple TV’s update images. These can help with hacking your Apple TV, or if you just want to keep them safe somewhere:
1.1.0 – 2Z694-5248-45.dmg
2.0.0 – 2Z694-5274-109.dmg
2.0.1 – 2Z694-5387-25.dmg
2.0.2 – 2Z694-5428-3.dmg
The combo updated which contains files that assist with Apple TV hacking. Note: I believe Apple have removed some files from this update that makes hacking the Apple TV a little harder, to be confirmed.
MacOS X 10.4.9 Combo Updater