1. Normal Sis 2 save works with the game and unlocks everything as intended.
2. The "animated" scenes are meh at best and barely consist of poorly done images tacked-on together to make you believe they're animated. To find them, apply the save file to [c:\users\whatever you named your account\appdata\roaming\mink\sische2] (Win7), start the game, click on "dude with thinking bubble" icon, select CG tab, scroll around until you see a redish-brown word (probably anime or something similar) on SOME of the CGs, click that bundle and the animated CGs are the 1st choice in the top left corner with same redish word on it.