Do you have the schematics of the gamesaves? In this case I can make an app to port savegames form a port to another.

EDITED: I managed to get savegames working by renaming .S** to *.zip, uncompressing and renaming it to .S**. Then it works on DS port.

Is there any way?
Because I tried to load savegames made in my ppc scummvm version, but they appear to be invalid.