Changing Apple TV2 default animal and flower screensaver

Just installed 1.1.1 (after slight error 9.100 hiccup which another tethered reboot resolved) and very pleased with  aTV Flash.

Where does Apple TV2 store its screensavers, and is there a way/app to replace them with photos of your own that doesn’t need your pc switched on to show?

 

Thanks

 

Hi, managed to gind the location after more googling and navigating the ATV2 via ftp:

/System/Library/PrivateFrameworks/AppleTV.framework…

/DefaultAnimalPhotos

/DefaultFlowerPhotos

 

I sneaked a new jpg into the latter and it seemed to be picked up OK in the screensaver - does anyone therefore know if I can replace the original images with my own, or even create new default folder in addition to those already stored on the device?