Can somebody tell me where do i find information like "do device X supports screensavers or animated pictures" or "device Y supports wallpaper in resolution 120x160 but what is screensaver's supported resolution".

I know there is document named techref_040730.pdf
but for example there is only one screen size per device and i am sure that 6600 screensaver's size can be bigger then wallpaper's.

Sadly device specification doesn't include that kind of information