Hmmm - you want to install a 22" TV, so I'm now wondering if you mean the bedroom TV mount?
If so, then the answer to that is also YES. I bought a Samsung 24" LED and mounted it to the spare TV-mount-adapter provided by Prime Time. It then just slides into the ceiling mount and works fine on the standard cable/antenna setup. However I did modify my wirng so as to also be able to watch Satellite TV in the bedroom or outside (although I haven't found the need for either
Some owners have posted they didn't get a spare mounting plate but it is supposed to be provided as it's a custom mount.