Blade_Runner4000: Hey guys, I just found a way to make the cutscenes of Atlantis The Lost Tales play at the correct framerate.
Note first that I'm running Windows 8 64bit on a multicore cpu, so I can't tell if this will work for everyone.

· Right click on the game's shortcut and select properties
· Go to Compatibility tab and remove all compatibility options including running as admin.
· Launch the game
· Open task manager (ctrl-alt-del)
· Right click on atlantis.exe process and select "go to details"
· Right click on the atlantis.exe that's now highlighted and set priority to high
· Right click again on the same and set afinity to "all cores"
· Close task manager and back into the game.

Your cutscenes should play smoothly now. Doesn't fix mouse lag but still one less problem.
You'll have to do this every time you run the game since it doesn't remember these settings.

Blade_Runner4000: cutscenes play smoothly (15 FPS seems to be the maximum movies framerate) by changing the 01 to a 00 at offset 656 (290 in hex) inside atlantis.exe

for the rest of the game, try changing E9 D2 FD 06 to 2D 00 05 00 (always inside atlantis.exe)
basical hex editing skills are required

-mirh